# Blocking error blocking error

**URL:** <https://discourse.nodered.org/t/blocking-error-blocking-error/90228>\
**Category:** General\
**Tags:** node-red-contrib-alexa-remote2-applestrudel\
**Created:** [17 August 2024 07:17 UTC](https://discourse.nodered.org/t/blocking-error-blocking-error/90228 "2024-08-17T07:17:13Z")\
**Posts on this page:** 20\
**Page:** 1

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**Author:** ![franz](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/franz/32/71949_2.png) [@franz](https://discourse.nodered.org/u/franz)\
**Post date:** [17 August 2024 07:17 UTC](https://discourse.nodered.org/t/blocking-error-blocking-error/90228/1 "2024-08-17T07:17:13Z")

</div>

nodered 3.1.7, after a few days of functioning correctly nodered crashes and I have to restart it manually to make it work. here is the error log it writes :`Unhandled rejection RequestError: Error: read ETIMEDOUT at new RequestError (/data/node_modules/request-promise-core/lib/errors.js:14:15) at Request.plumbing.callback (/data/node_modules/request-promise-core/lib/plumbing.js:87:29) at Request.RP$callback [as _callback] (/data/node_modules/request-promise-core/lib/plumbing.js:46:31) at self.callback (/data/node_modules/request/request.js:185:22) at Request.emit (node:events:513:28) at Request.onRequestError (/data/node_modules/request/request.js:877:8) at ClientRequest.emit (node:events:513:28) at TLSSocket.socketErrorListener (node:_http_client:494:9) at TLSSocket.emit (node:events:513:28) at emitErrorNT (node:internal/streams/destroy:157:8) at emitErrorCloseNT (node:internal/streams/destroy:122:3) at processTicksAndRejections (node:internal/process/task_queues:83:21)`

what could this be due to? has anyone had this problem before

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<div class="post-metadata">

**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [17 August 2024 07:39 UTC](https://discourse.nodered.org/t/blocking-error-blocking-error/90228/2 "2024-08-17T07:39:53Z")

</div>

A node or function node using the package `request` is not correctly handling exceptions.

Are you making http requests from within a function node?

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<div class="post-metadata">

**Author:** ![franz](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/franz/32/71949_2.png) [@franz](https://discourse.nodered.org/u/franz)\
**Post date:** [29 September 2024 07:15 UTC](https://discourse.nodered.org/t/blocking-error-blocking-error/90228/3 "2024-09-29T07:15:37Z")

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yes it is a sequence for querying the API of a site, for now it is disabled but I would like to restore it, I can't find the error even by trial and error it keeps giving an error after a few hours of operation. Sorry for replying now but the forum notification service is not working for me.

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<div class="post-metadata">

**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [29 September 2024 08:54 UTC](https://discourse.nodered.org/t/blocking-error-blocking-error/90228/4 "2024-09-29T08:54:30Z")

</div>

Add try .. catch blocks around the requests in the function node, that should catch the error.

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<div class="post-metadata">

**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [29 September 2024 09:05 UTC](https://discourse.nodered.org/t/blocking-error-blocking-error/90228/5 "2024-09-29T09:05:44Z")

</div>

If you are doing async, use `try...catch` if you are using promises, add a `.catch` handler.

Better still, use the built in http-request node and it is all done for you.

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<div class="post-metadata">

**Author:** ![franz](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/franz/32/71949_2.png) [@franz](https://discourse.nodered.org/u/franz)\
**Post date:** [29 September 2024 17:29 UTC](https://discourse.nodered.org/t/blocking-error-blocking-error/90228/6 "2024-09-29T17:29:05Z")

</div>

@colin,@steve,  
I will now try to edit then write down what I have changed

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<div class="post-metadata">

**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [29 September 2024 18:08 UTC](https://discourse.nodered.org/t/blocking-error-blocking-error/90228/7 "2024-09-29T18:08:54Z")

</div>

Why are you not using the http node?

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<div class="post-metadata">

**Author:** ![franz](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/franz/32/71949_2.png) [@franz](https://discourse.nodered.org/u/franz)\
**Post date:** [29 September 2024 18:47 UTC](https://discourse.nodered.org/t/blocking-error-blocking-error/90228/8 "2024-09-29T18:47:27Z")

</div>

the node is this, basically it is an alert that reads api data on bybit, compares it to a minimum set by dashboard page, and if it is below the threshold it sends a voice alert with alexa.  
[flows.json](https://discourse.nodered.org/uploads/short-url/7eeXa4xrc55iGxAfiHUF8ogXKEf.json) (15,0 KB)  
can't find the error in the http request 😓

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<div class="post-metadata">

**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [29 September 2024 20:32 UTC](https://discourse.nodered.org/t/blocking-error-blocking-error/90228/9 "2024-09-29T20:32:17Z")

</div>

For the future please see this post for details of the preferred method of posting flows - [How to share code or flow json](https://discourse.nodered.org/t/how-to-share-code-or-flow-json/506)

Earlier you said that you were making http requests from within a function node, but the flow you posted is using an http request node. Are you saying that the http request node is generating the error that you posted at the start?

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<div class="post-metadata">

**Author:** ![franz](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/franz/32/71949_2.png) [@franz](https://discourse.nodered.org/u/franz)\
**Post date:** [30 September 2024 06:26 UTC](https://discourse.nodered.org/t/blocking-error-blocking-error/90228/10 "2024-09-30T06:26:47Z")

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Yes, and I don't know what to think anymore.

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<div class="post-metadata">

**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [30 September 2024 07:35 UTC](https://discourse.nodered.org/t/blocking-error-blocking-error/90228/11 "2024-09-30T07:35:29Z")

</div>

> [@franz](#):
>
> Yes

That is unlikely. The error in the first post comes from `/data/node_modules/request/request.js` (AKA `request` lib) whereas Node-RED HTTP-Request node uses `GOT` lib)

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<div class="post-metadata">

**Author:** ![franz](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/franz/32/71949_2.png) [@franz](https://discourse.nodered.org/u/franz)\
**Post date:** [30 September 2024 07:48 UTC](https://discourse.nodered.org/t/blocking-error-blocking-error/90228/12 "2024-09-30T07:48:18Z")

</div>

> [@Steve-Mcl](#):
>
> That is unlikely. The error in the first post comes from `/data/node_modules/request/request.js` (AKA `request` lib) whereas Node-RED HTTP-Request node uses `GOT` lib)

however, by disabling the node mentioned above ,nodered does not crash and works regularly

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<div class="post-metadata">

**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [30 September 2024 07:54 UTC](https://discourse.nodered.org/t/blocking-error-blocking-error/90228/13 "2024-09-30T07:54:14Z")

</div>

> [@franz](#):
>
> by disabling the node mentioned above ,nodered does not crash and works regularly

yes, probably because of what follows - the alexa node. If the request is disabled, the next nodes in the chain are NOT triggered!

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/5/4/541d1f7b0935d2456e294fd4a0f55d9c6a74eca1.png)

---

<div class="post-metadata">

**Author:** ![franz](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/franz/32/71949_2.png) [@franz](https://discourse.nodered.org/u/franz)\
**Post date:** [30 September 2024 08:24 UTC](https://discourse.nodered.org/t/blocking-error-blocking-error/90228/14 "2024-09-30T08:24:17Z")

</div>

> [@franz](#):
>
> by disabling the node mentioned above ,nodered does not crash and works regularly

so it would mean that the 'error is not to be found in the flow that I reported above , but in the others that I have ?

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<div class="post-metadata">

**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [30 September 2024 08:35 UTC](https://discourse.nodered.org/t/blocking-error-blocking-error/90228/15 "2024-09-30T08:35:43Z")

</div>

Disconnect the wire to the alexa node and see what happens.  
If it still crashes then disconnect the wire from the http request node and try again. Then work forward till you find the problem node.

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<div class="post-metadata">

**Author:** ![franz](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/franz/32/71949_2.png) [@franz](https://discourse.nodered.org/u/franz)\
**Post date:** [8 October 2024 09:15 UTC](https://discourse.nodered.org/t/blocking-error-blocking-error/90228/16 "2024-10-08T09:15:37Z")

</div>

After about a week of testing I have disconnected about fifty nodes and waited a few hours to check if the problem was occurring I found these two nodes which when activated give an error.

- They serve respectively to send a warning of voltage too high or low (I have the operator's cabin very close by) .
- Another alert is used to warn via alexa of an overload on the meter to avoid disconnection after a few minutes of overload.

```auto
[
    {
        "id": "849f833ae6e15879",
        "type": "comment",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "avvisi ed allarmi",
        "info": "",
        "x": 220,
        "y": 1960,
        "wires": []
    },
    {
        "id": "738bc12abfce592a",
        "type": "switch",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "",
        "property": "payload",
        "propertyType": "msg",
        "rules": [
            {
                "t": "gte",
                "v": "250",
                "vt": "str"
            },
            {
                "t": "lte",
                "v": "200",
                "vt": "str"
            },
            {
                "t": "btwn",
                "v": "210",
                "vt": "num",
                "v2": "249",
                "v2t": "num"
            }
        ],
        "checkall": "true",
        "repair": false,
        "outputs": 3,
        "x": 710,
        "y": 2080,
        "wires": [
            [
                "a340daf1baf7033b"
            ],
            [
                "a340daf1baf7033b"
            ],
            [
                "d7f3fe2f2d471cb6"
            ]
        ]
    },
    {
        "id": "d7f3fe2f2d471cb6",
        "type": "change",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "",
        "rules": [
            {
                "t": "set",
                "p": "reset",
                "pt": "msg",
                "to": "true",
                "tot": "bool"
            }
        ],
        "action": "",
        "property": "",
        "from": "",
        "to": "",
        "reg": false,
        "x": 920,
        "y": 2120,
        "wires": [
            [
                "a340daf1baf7033b"
            ]
        ]
    },
    {
        "id": "a340daf1baf7033b",
        "type": "trigger",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "",
        "op1": "",
        "op2": "0",
        "op1type": "pay",
        "op2type": "str",
        "duration": "0",
        "extend": false,
        "overrideDelay": false,
        "units": "ms",
        "reset": "",
        "bytopic": "all",
        "topic": "topic",
        "outputs": 1,
        "x": 920,
        "y": 2060,
        "wires": [
            [
                "21dcf73a6769abe5"
            ]
        ]
    },
    {
        "id": "21dcf73a6769abe5",
        "type": "function",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "function 1",
        "func": "var msg1 = \"la tensione di casa, ha valori fuori norma, \";\nvar msg2 = msg.payload;\nvar msg3 = \" Ciaone\";\n\n\nreturn [{payload:msg1+msg2+msg3}]\nreturn msg;",
        "outputs": 1,
        "timeout": "",
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 1080,
        "y": 2060,
        "wires": [
            [
                "6d57981c3d2da24a"
            ]
        ]
    },
    {
        "id": "5c3a6698c64bc1b5",
        "type": "alexa-remote-routine",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "",
        "account": "e0d0608560b4720d",
        "routineNode": {
            "type": "speakAtVolume",
            "payload": {
                "type": "regular",
                "text": {
                    "type": "msg",
                    "value": "payload"
                },
                "volume": {
                    "type": "num",
                    "value": "25"
                },
                "mode": "set",
                "devices": [
                    "18e395e9bf2e4604bad62de8bf305428"
                ]
            }
        },
        "x": 1490,
        "y": 2060,
        "wires": [
            []
        ]
    },
    {
        "id": "4083cf1f3fe2caa1",
        "type": "telegram sender",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "testdomo",
        "bot": "65de0924a6725207",
        "haserroroutput": false,
        "outputs": 1,
        "x": 1420,
        "y": 2120,
        "wires": [
            []
        ]
    },
    {
        "id": "60a55c27950726e3",
        "type": "function",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "function 2",
        "func": "var voltage = flow.get(\"voltage\") || 0;\nvoltage = voltage.toString();\n\nvar message = \"tensione fuori norma,la lettura è di \" + voltage + \" volts\";\nmsg.payload = message;\n\nvar msg1 = msg.payload\nmsg.payload = {}\n\nmsg.payload.chatId = \"-1001855120388\"\nmsg.payload.type = \"message\"\nmsg.payload.content = msg1\n\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 1240,
        "y": 2120,
        "wires": [
            [
                "4083cf1f3fe2caa1"
            ]
        ]
    },
    {
        "id": "6d57981c3d2da24a",
        "type": "time-range-switch",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "",
        "lat": "",
        "lon": "",
        "startTime": "22:00",
        "endTime": "7:00",
        "startOffset": 0,
        "endOffset": 0,
        "x": 1230,
        "y": 2060,
        "wires": [
            [],
            [
                "5c3a6698c64bc1b5",
                "60a55c27950726e3"
            ]
        ]
    },
    {
        "id": "33e192d3fd034486",
        "type": "function",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "Read variable(s) for Alexa",
        "func": "// Get the flow variable(s) to be used in the message\nvar voltage = flow.get(\"voltage\") || 0;\n\n// Convert them to a string\nvoltage = voltage.toString();\n\n\nvar message = \"la tensione è di <break time='0.5s'/>\"+voltage+ \"volts .<break time='0.25s'/>\";\n\nmsg.payload = message;\nreturn msg;\n",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 510,
        "y": 2080,
        "wires": [
            [
                "738bc12abfce592a"
            ]
        ]
    },
    {
        "id": "e0befd265a991399",
        "type": "inject",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "60",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "",
        "payloadType": "date",
        "x": 270,
        "y": 2080,
        "wires": [
            [
                "33e192d3fd034486"
            ]
        ]
    },
    {
        "id": "3586afff621062f1",
        "type": "switch",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "",
        "property": "payload",
        "propertyType": "msg",
        "rules": [
            {
                "t": "gte",
                "v": "3750",
                "vt": "num"
            }
        ],
        "checkall": "true",
        "repair": false,
        "outputs": 1,
        "x": 690,
        "y": 2280,
        "wires": [
            [
                "8026d55f61107576"
            ]
        ]
    },
    {
        "id": "14487cd6b31fb767",
        "type": "alexa-remote-routine",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "",
        "account": "e0d0608560b4720d",
        "routineNode": {
            "type": "speakAtVolume",
            "payload": {
                "type": "regular",
                "text": {
                    "type": "msg",
                    "value": "payload"
                },
                "volume": {
                    "type": "num",
                    "value": "25"
                },
                "mode": "set",
                "devices": [
                    "18e395e9bf2e4604bad62de8bf305428"
                ]
            }
        },
        "x": 1450,
        "y": 2220,
        "wires": [
            []
        ]
    },
    {
        "id": "a2de2cca9f04824a",
        "type": "telegram sender",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "msg to gruppodomo",
        "bot": "65de0924a6725207",
        "haserroroutput": false,
        "outputs": 1,
        "x": 1460,
        "y": 2320,
        "wires": [
            []
        ]
    },
    {
        "id": "16ae92586ba8dd67",
        "type": "function",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "function 5",
        "func": "var power = flow.get(\"power\") || 0;\npower = power.toString();\n\nvar message = \"sovraccarico,la lettura è di \" + power + \" watts spegnere apparecchio\";\nmsg.payload = message;\n\nvar msg1 = msg.payload\nmsg.payload = {}\n\nmsg.payload.chatId = \"-1001855120388\"\nmsg.payload.type = \"message\"\nmsg.payload.content = msg1\n\nreturn msg;",
        "outputs": 1,
        "timeout": "",
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 1140,
        "y": 2320,
        "wires": [
            []
        ]
    },
    {
        "id": "8026d55f61107576",
        "type": "time-range-switch",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "",
        "lat": "",
        "lon": "",
        "startTime": "23:59",
        "endTime": "6:00",
        "startOffset": 0,
        "endOffset": 0,
        "x": 870,
        "y": 2280,
        "wires": [
            [],
            [
                "16ae92586ba8dd67",
                "bfa80fe7ec7ffb47",
                "f3e087cf92f0443d"
            ]
        ]
    },
    {
        "id": "cf119dde6c102cd0",
        "type": "function",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "Read variable(s) for Alexa",
        "func": "// Get the flow variable(s) to be used in the message\nvar power = flow.get(\"power\") || 0;\n\n// Convert them to a string\n//power = power.toString();\n\n\n//var message = \"la potenza è di <break time='0.5s'/>\"+power+ \"watts .<break time='0.25s'/>\";\n\nmsg.payload = power;\nreturn msg;\n",
        "outputs": 1,
        "timeout": "",
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 510,
        "y": 2280,
        "wires": [
            [
                "3586afff621062f1"
            ]
        ]
    },
    {
        "id": "52785f42c9a8c43a",
        "type": "inject",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "30",
        "crontab": "",
        "once": false,
        "onceDelay": "1",
        "topic": "",
        "payload": "",
        "payloadType": "date",
        "x": 270,
        "y": 2280,
        "wires": [
            [
                "cf119dde6c102cd0"
            ]
        ]
    },
    {
        "id": "bfa80fe7ec7ffb47",
        "type": "function",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "function 6",
        "func": "var msg1 = \"avviso di sovraccarico <break time='0.25s'/> spegnere o abbassare apparecchio <break time='0.25s'/> \";\nvar msg2 = msg.payload;\nvar msg3 = \" watts \";\n\n\nreturn [{payload:msg1+msg2+msg3}]\nreturn msg;",
        "outputs": 1,
        "timeout": "",
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 1140,
        "y": 2260,
        "wires": [
            [
                "14487cd6b31fb767",
                "f127f1d53de9eb25"
            ]
        ]
    },
    {
        "id": "f3e087cf92f0443d",
        "type": "function",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "function 7",
        "func": "var power = flow.get(\"power\") || 0;\npower = power.toString();\n\nvar message = \"sovraccarico,la lettura è di \" + power + \" watts spegnere apparecchio\";\nmsg.payload = message;\n\nvar msg1 = msg.payload\nmsg.payload = {}\n\nmsg.payload.chatId = \"-1001654395886\"\nmsg.payload.type = \"message\"\nmsg.payload.content = msg1\n\nreturn msg;",
        "outputs": 1,
        "timeout": "",
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 1140,
        "y": 2380,
        "wires": [
            [
                "11f773a74b83416b"
            ]
        ]
    },
    {
        "id": "11f773a74b83416b",
        "type": "telegram sender",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "msg to Avvisi",
        "bot": "c254c8951ae33eec",
        "haserroroutput": false,
        "outputs": 1,
        "x": 1430,
        "y": 2380,
        "wires": [
            []
        ]
    },
    {
        "id": "5fa1aa10b7918747",
        "type": "comment",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "alert sovraccarico",
        "info": "",
        "x": 380,
        "y": 2220,
        "wires": []
    },
    {
        "id": "591713b32c85cbce",
        "type": "comment",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "alert tensione di rete",
        "info": "",
        "x": 390,
        "y": 2020,
        "wires": []
    },
    {
        "id": "f127f1d53de9eb25",
        "type": "alexa-remote-routine",
        "z": "0420bb4bf87242a2",
        "d": true,
        "name": "",
        "account": "e0d0608560b4720d",
        "routineNode": {
            "type": "speakAtVolume",
            "payload": {
                "type": "regular",
                "text": {
                    "type": "msg",
                    "value": "payload"
                },
                "volume": {
                    "type": "num",
                    "value": "40"
                },
                "mode": "set",
                "devices": [
                    "G091AA10139601L8"
                ]
            }
        },
        "x": 1450,
        "y": 2280,
        "wires": [
            []
        ]
    },
    {
        "id": "4c945cd3f0e80e15",
        "type": "mqtt in",
        "z": "0420bb4bf87242a2",
        "name": "Voltaggio",
        "topic": "tele/sensore_energia/SENSOR",
        "qos": "2",
        "datatype": "json",
        "broker": "22f544be.780a3c",
        "nl": false,
        "rap": false,
        "inputs": 0,
        "x": 200,
        "y": 260,
        "wires": [
            [
                "723fc828f32b513d"
            ]
        ]
    },
    {
        "id": "723fc828f32b513d",
        "type": "function",
        "z": "0420bb4bf87242a2",
        "name": "",
        "func": "// Save the reading(s) in a flow variable\n\nflow.set(\"voltage\", msg.payload.ENERGY.Voltage);\n\nreturn null;\n",
        "outputs": 0,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 400,
        "y": 260,
        "wires": []
    },
    {
        "id": "5d82858f38077a66",
        "type": "mqtt in",
        "z": "0420bb4bf87242a2",
        "name": "sensore potenza",
        "topic": "tele/sensore_energia/SENSOR",
        "qos": "2",
        "datatype": "json",
        "broker": "22f544be.780a3c",
        "nl": false,
        "rap": false,
        "inputs": 0,
        "x": 220,
        "y": 140,
        "wires": [
            [
                "1705132c3f20686c"
            ]
        ]
    },
    {
        "id": "1705132c3f20686c",
        "type": "function",
        "z": "0420bb4bf87242a2",
        "name": "",
        "func": "// Save the reading(s) in a flow variable\n\nflow.set(\"power\", msg.payload.ENERGY.Power);\n\nreturn null;\n",
        "outputs": 0,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 400,
        "y": 140,
        "wires": []
    },
    {
        "id": "e0d0608560b4720d",
        "type": "alexa-remote-account",
        "name": "alexa",
        "authMethod": "proxy",
        "proxyOwnIp": "10.0.0.202",
        "proxyPort": "3456",
        "cookieFile": "/data/authFile.cookie",
        "refreshInterval": "1",
        "alexaServiceHost": "alexa.amazon.it",
        "pushDispatchHost": "",
        "amazonPage": "amazon.it",
        "acceptLanguage": "it-IT",
        "onKeywordInLanguage": "",
        "userAgent": "",
        "usePushConnection": "on",
        "autoInit": "on",
        "autoQueryActivityOnTrigger": "on"
    },
    {
        "id": "65de0924a6725207",
        "type": "telegram bot",
        "botname": "domotest_bot",
        "usernames": "test",
        "chatids": "",
        "baseapiurl": "",
        "updatemode": "polling",
        "pollinterval": "300",
        "usesocks": false,
        "sockshost": "",
        "socksprotocol": "socks5",
        "socksport": "6667",
        "socksusername": "anonymous",
        "sockspassword": "",
        "bothost": "",
        "botpath": "",
        "localbotport": "8443",
        "publicbotport": "8443",
        "privatekey": "",
        "certificate": "",
        "useselfsignedcertificate": false,
        "sslterminated": false,
        "verboselogging": false
    },
    {
        "id": "c254c8951ae33eec",
        "type": "telegram bot",
        "botname": "Avvisi",
        "usernames": "test",
        "chatids": "",
        "baseapiurl": "",
        "updatemode": "polling",
        "pollinterval": "300",
        "usesocks": false,
        "sockshost": "",
        "socksprotocol": "socks5",
        "socksport": "6667",
        "socksusername": "anonymous",
        "sockspassword": "",
        "bothost": "",
        "botpath": "",
        "localbotport": "8443",
        "publicbotport": "8443",
        "privatekey": "",
        "certificate": "",
        "useselfsignedcertificate": false,
        "sslterminated": false,
        "verboselogging": false
    },
    {
        "id": "22f544be.780a3c",
        "type": "mqtt-broker",
        "name": "Mosquitto",
        "broker": "10.0.0.202",
        "port": "1883",
        "clientid": "",
        "autoConnect": true,
        "usetls": false,
        "compatmode": false,
        "protocolVersion": "4",
        "keepalive": "60",
        "cleansession": true,
        "autoUnsubscribe": true,
        "birthTopic": "",
        "birthQos": "0",
        "birthPayload": "",
        "birthMsg": {},
        "closeTopic": "",
        "closeQos": "0",
        "closePayload": "",
        "closeMsg": {},
        "willTopic": "",
        "willQos": "0",
        "willPayload": "",
        "willMsg": {},
        "userProps": "",
        "sessionExpiry": ""
    }
]

```

in the syntax, I cannot see what is causing the error.

---

<div class="post-metadata">

**Author:** ![zenofmud](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/zenofmud/32/316_2.png) [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Post date:** [8 October 2024 11:01 UTC](https://discourse.nodered.org/t/blocking-error-blocking-error/90228/17 "2024-10-08T11:01:05Z")

</div>

Which two nodes? The flow you provided has 25 nodes in it. Try adding a `catch` node connected to a `debug` node (set to display the complete msg object) to see if that helps.

If you can point to the nodes that are causing the error and can provide the data going into the node people might be able to spot the issue.

---

<div class="post-metadata">

**Author:** ![franz](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/franz/32/71949_2.png) [@franz](https://discourse.nodered.org/u/franz)\
**Post date:** [8 October 2024 12:01 UTC](https://discourse.nodered.org/t/blocking-error-blocking-error/90228/18 "2024-10-08T12:01:01Z")

</div>

in catch I selected the nodes in the first alert , but so far it has not returned any errors yet

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/7/f/7f2c89c1a3c20ebd6fbc2064870332a8e40ce129.png)

---

<div class="post-metadata">

**Author:** ![zenofmud](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/zenofmud/32/316_2.png) [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Post date:** [8 October 2024 12:25 UTC](https://discourse.nodered.org/t/blocking-error-blocking-error/90228/19 "2024-10-08T12:25:08Z")

</div>

If you want people to help you and they ask questions you need to answer them or people will stop looking at your problem,

---

<div class="post-metadata">

**Author:** ![franz](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/franz/32/71949_2.png) [@franz](https://discourse.nodered.org/u/franz)\
**Post date:** [8 October 2024 12:43 UTC](https://discourse.nodered.org/t/blocking-error-blocking-error/90228/20 "2024-10-08T12:43:06Z")

</div>

> [@zenofmud](#):
>
> Try adding a `catch` node connected to a `debug` node (set to display the complete msg object) to see if that helps.
> 
> If you can point to the nodes that are causing the error and can provide the data going into the node people might be able to spot the issue.

I know the nodes that give that error are the ones posted 3 hours ago ( because enabling them after a while the error appears ) , I enabled catch as you suggested but it still doesn't give me details .

[Next page](https://discourse.nodered.org/t/blocking-error-blocking-error/90228.md?page=2)