# SVG node error message
**URL:** https://discourse.nodered.org/t/svg-node-error-message/35931
**Category:** General
**Created:** [14 November 2020 21:14 UTC](https://discourse.nodered.org/t/svg-node-error-message/35931 "2020-11-14T21:14:49Z")
**Posts on this page:** 9
**Page:** 1
### Author:  [@RASelkirk](https://discourse.nodered.org/u/RASelkirk)
#### Post date: [14 November 2020 21:14 UTC](https://discourse.nodered.org/t/svg-node-error-message/35931/1 "2020-11-14T21:14:49Z")
Hi All,
Whenever I deploy my flows, I get an error for each of my two SVG nodes in the debug panel. Enclosed pic shows one, both are the same. I have no msg.topic either in the node or feeding it. How can I track this down?
Russ
---
### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [14 November 2020 21:25 UTC](https://discourse.nodered.org/t/svg-node-error-message/35931/2 "2020-11-14T21:25:42Z")
Quite had to tell without seeing your flow.
do you inject anything into the SVG node?
could you export your flow?
(to export a flow, press ctrl+e, then copy, then paste it ...
`````
` between back ticks like this`
`````
... in your reply)
At a guess, since you have `deploy` set to `all nodes`, you have something injecting an invalid topic into the SVG nodes on startup (which happens when you deploy all)
---
### Author:  [@RASelkirk](https://discourse.nodered.org/u/RASelkirk)
#### Post date: [14 November 2020 22:24 UTC](https://discourse.nodered.org/t/svg-node-error-message/35931/3 "2020-11-14T22:24:48Z")
Here's my full gate opener project, fully tested and working on a breadboard:
```auto
[{"id":"c199b9b6.017a2","type":"tab","label":"Main","disabled":false,"info":""},{"id":"37454ed8.bb979a","type":"group","z":"c199b9b6.017a2","name":"Blink Close","style":{"label":true,"stroke":"#92d04f","color":"#000000","fill":"#92d04f","fill-opacity":"0.25"},"nodes":["101283e3.5a2cec","2ed90451.d4cc34","49f519a.fee9c68","ffbc3276.5f7b78"],"x":4,"y":419,"w":432,"h":132,"info":"\"Closing...\" node injects 1 into \"lock-out\" node (prevents multiple injects from wrecking the label), \"lock-out\" node then starts \"startBlink\" function node which sends msg.topic CLOSING to label at user-defined flash rate.\n\n\"Stopped\" node injects 0 into \"lock-out\" node for a reset and into \"stopBlink\" node which sends msg.topic STOPPED to label"},{"id":"654959fe.739e78","type":"group","z":"c199b9b6.017a2","name":"Blinking Label","style":{"stroke":"#92d04f","fill":"#92d04f","fill-opacity":"0.25","label":true,"color":"#000000"},"nodes":["fa369d6f.dde448"],"x":684,"y":279,"w":192,"h":82},{"id":"71d5a00a.73848","type":"group","z":"c199b9b6.017a2","name":"GPIO pim 40 verification closed","style":{"stroke":"#6f2fa0","fill":"#6f2fa0","fill-opacity":"0.25","label":true,"color":"#000000"},"nodes":["2fa1b114.94cff6","afd0b118.45cb58","b1a6e150.0276e8","95376fc5.6e31c"],"x":4,"y":9,"w":432,"h":132},{"id":"9fb89002.5b5b","type":"group","z":"c199b9b6.017a2","name":"Blink Open","style":{"label":true,"stroke":"#92d04f","color":"#000000","fill":"#92d04f","fill-opacity":"0.25"},"nodes":["3b1e7a35.b3fd86","58e5261d.011b5","2c6747c3.3855f8","b9842ca1.7a2d6"],"x":4,"y":149,"w":432,"h":132},{"id":"a7402322.19d7e","type":"group","z":"c199b9b6.017a2","name":"GPIO pin 38 verification open","style":{"stroke":"#6f2fa0","fill":"#6f2fa0","fill-opacity":"0.25","label":true,"color":"#000000"},"nodes":["3f8dee4c.474622","ab956729.6141f","5189b379.44c39c","a912f64a.f60bf"],"x":4,"y":289,"w":432,"h":122},{"id":"bd3964c9.d73fe8","type":"group","z":"c199b9b6.017a2","name":" GPIO-in Motor Switch","style":{"stroke":"#ff0000","label":true,"color":"#000000","fill":"#ff0000","fill-opacity":"0.25"},"nodes":["9faf751d.055c28","cd455311.b7c26","60eec998.409068","14fa76b1.f7f769"],"x":594,"y":419,"w":382,"h":132},{"id":"dea38dc1.3a8ca","type":"group","z":"c199b9b6.017a2","name":"Open-Close SVG LEDs","style":{"stroke":"#6f2fa0","fill":"#6f2fa0","fill-opacity":"0.25","label":true,"color":"#000000"},"nodes":["235bd56a.d9af4a","f9f17505.564b88"],"x":594,"y":149,"w":372,"h":82},{"id":"fc2942fb.cd18","type":"group","z":"c199b9b6.017a2","name":"Text Labels","style":{"stroke":"#000000","label":true,"color":"#000000","fill":"#d1d1d1","fill-opacity":"0.25"},"nodes":["d5ef05f8.79b11","e1031575.90e7b"],"x":608,"y":10,"w":342,"h":82},{"id":"3b1e7a35.b3fd86","type":"function","z":"c199b9b6.017a2","g":"9fb89002.5b5b","name":"startBlink","func":"var BLINKDELAY = 800;\n\nvar light = true;\n\n\nvar blinker = setInterval(blink, BLINKDELAY);\n\nglobal.set(\"blinker\", blinker);\n\nfunction blink () {\n \n if (light) {\n msg.payload = false;\n msg.topic = \"\";\n light = false;\n }\n \n else {\n msg.payload = true;\n msg.topic = \"OPENING\";\n light = true;\n }\n \n node.send(msg);\n}\n\n\nreturn;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":350,"y":230,"wires":[["fa369d6f.dde448"]]},{"id":"58e5261d.011b5","type":"function","z":"c199b9b6.017a2","g":"9fb89002.5b5b","name":"stopBlink","func":"clearInterval(global.get(\"blinker\"));\n\nmsg.payload = false;\nmsg.topic = \"STOPPED\";\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":350,"y":190,"wires":[["fa369d6f.dde448"]]},{"id":"d5ef05f8.79b11","type":"ui_text","z":"c199b9b6.017a2","g":"fc2942fb.cd18","group":"4eddf1f8.72684","order":2,"width":1,"height":1,"name":"open","label":"Open","format":"{{msg.payload}}","layout":"row-right","x":684,"y":51,"wires":[]},{"id":"e1031575.90e7b","type":"ui_text","z":"c199b9b6.017a2","g":"fc2942fb.cd18","group":"4eddf1f8.72684","order":4,"width":1,"height":1,"name":"close","label":"Closed","format":"{{msg.payload}}","layout":"row-right","x":874,"y":51,"wires":[],"info":"Must go in CSS template node:\n\n.nr-dashboard-theme .nr-dashboard-text .label {\n font-size: 30px;\n }"},{"id":"fa369d6f.dde448","type":"ui_text","z":"c199b9b6.017a2","g":"654959fe.739e78","group":"fbf8a8dd.af27e8","order":2,"width":4,"height":1,"name":"blinking label","label":" ","format":"{{msg.topic}}","layout":"col-center","x":780,"y":320,"wires":[],"info":"// Add to CSS template node:\n\n.nr-dashboard-theme .nr-dashboard-text .label {\n font-size: 30px;\n }"},{"id":"101283e3.5a2cec","type":"function","z":"c199b9b6.017a2","g":"37454ed8.bb979a","name":"startBlink","func":"var BLINKDELAY = 800;\n\nvar light = true;\n\n\nvar blinker = setInterval(blink, BLINKDELAY);\n\nglobal.set(\"blinker\", blinker);\n\nfunction blink () {\n \n if (light) {\n msg.payload = false;\n msg.topic = \"\";\n light = false;\n }\n \n else {\n msg.payload = true;\n msg.topic = \"CLOSING\";\n light = true;\n }\n \n node.send(msg);\n}\n\n\nreturn;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":350,"y":500,"wires":[["fa369d6f.dde448"]]},{"id":"2ed90451.d4cc34","type":"function","z":"c199b9b6.017a2","g":"37454ed8.bb979a","name":"stopBlink","func":"clearInterval(global.get(\"blinker\"));\n\nmsg.payload = false;\nmsg.topic = \"STOPPED\";\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":350,"y":460,"wires":[["fa369d6f.dde448"]]},{"id":"3f8dee4c.474622","type":"switch","z":"c199b9b6.017a2","g":"a7402322.19d7e","name":"If input is 0","property":"payload","propertyType":"msg","rules":[{"t":"eq","v":"0","vt":"num"},{"t":"else"}],"checkall":"true","repair":false,"outputs":2,"x":110,"y":330,"wires":[["5189b379.44c39c"],["ab956729.6141f"]]},{"id":"ab956729.6141f","type":"change","z":"c199b9b6.017a2","g":"a7402322.19d7e","name":"Change to 0","rules":[{"t":"set","p":"payload","pt":"msg","to":"{\"command\":\"update_style\",\"selector\":\"#verOpen\",\"attributeName\":\"fill\",\"attributeValue\":\"#333333\"}","tot":"json"}],"action":"","property":"","from":"","to":"","reg":false,"x":340,"y":370,"wires":[["235bd56a.d9af4a"]]},{"id":"5189b379.44c39c","type":"change","z":"c199b9b6.017a2","g":"a7402322.19d7e","name":"Change to 1","rules":[{"t":"set","p":"payload","pt":"msg","to":"{\"command\":\"update_style\",\"selector\":\"#verOpen\",\"attributeName\":\"fill\",\"attributeValue\":\"#1E90FF\"}","tot":"json"},{"t":"set","p":"topic","pt":"msg","to":"","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":340,"y":330,"wires":[["235bd56a.d9af4a","fa369d6f.dde448"]],"info":"Blank msg.topic here clears _blinking label node_\nof \"STOPPED\" upon verification open."},{"id":"2c6747c3.3855f8","type":"while-loop","z":"c199b9b6.017a2","g":"9fb89002.5b5b","name":"while loop","condi":"msg.payload == 1","x":100,"y":190,"wires":[["58e5261d.011b5"],["3b1e7a35.b3fd86"]]},{"id":"49f519a.fee9c68","type":"while-loop","z":"c199b9b6.017a2","g":"37454ed8.bb979a","name":"while loop","condi":"msg.payload == 1","x":100,"y":460,"wires":[["2ed90451.d4cc34"],["101283e3.5a2cec"]]},{"id":"2fa1b114.94cff6","type":"rpi-gpio in","z":"c199b9b6.017a2","g":"71d5a00a.73848","name":"40 C-Verified","pin":"40","intype":"tri","debounce":"25","read":true,"x":100,"y":90,"wires":[["afd0b118.45cb58"]]},{"id":"a912f64a.f60bf","type":"rpi-gpio in","z":"c199b9b6.017a2","g":"a7402322.19d7e","name":"38 O-Verified","pin":"38","intype":"tri","debounce":"25","read":true,"x":100,"y":370,"wires":[["3f8dee4c.474622"]]},{"id":"afd0b118.45cb58","type":"switch","z":"c199b9b6.017a2","g":"71d5a00a.73848","name":"If input is 0","property":"payload","propertyType":"msg","rules":[{"t":"eq","v":"0","vt":"num"},{"t":"else"}],"checkall":"true","repair":false,"outputs":2,"x":110,"y":50,"wires":[["95376fc5.6e31c"],["b1a6e150.0276e8"]]},{"id":"b1a6e150.0276e8","type":"change","z":"c199b9b6.017a2","g":"71d5a00a.73848","name":"Change to 0","rules":[{"t":"set","p":"payload","pt":"msg","to":"{\"command\":\"update_style\",\"selector\":\"#verClosed\",\"attributeName\":\"fill\",\"attributeValue\":\"#333333\"}","tot":"json"},{"t":"set","p":"topic","pt":"msg","to":"","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":340,"y":100,"wires":[["f9f17505.564b88"]]},{"id":"95376fc5.6e31c","type":"change","z":"c199b9b6.017a2","g":"71d5a00a.73848","name":"Change to 1","rules":[{"t":"set","p":"payload","pt":"msg","to":"{\"command\":\"update_style\",\"selector\":\"#verClosed\",\"attributeName\":\"fill\",\"attributeValue\":\"#1E90FF\"}","tot":"json"},{"t":"set","p":"topic","pt":"msg","to":"","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":340,"y":60,"wires":[["f9f17505.564b88","fa369d6f.dde448"]],"info":"Blank msg.topic here clears _blinking label node_\nof \"STOPPED\" upon closed verification."},{"id":"235bd56a.d9af4a","type":"ui_svg_graphics","z":"c199b9b6.017a2","g":"dea38dc1.3a8ca","group":"7deb7f7c.de4dd","order":1,"width":3,"height":2,"svgString":"\n\n","clickableShapes":[],"smilAnimations":[],"bindings":[],"showCoordinates":false,"autoFormatAfterEdit":false,"showBrowserErrors":false,"outputField":"payload","editorUrl":"//drawsvg.org/drawsvg.html","directory":"","panning":"disabled","zooming":"disabled","panOnlyWhenZoomed":false,"doubleClickZoomEnabled":false,"mouseWheelZoomEnabled":false,"name":"verOpen","x":680,"y":190,"wires":[[]],"info":"Ensure you have the element named as in \"id=[name]\"\n\nPass the arguement as a JSON in msg.payload (selector is id name, preceed with #).\n \n{\n \"command\": \"update_style\",\n \"selector\": \"#verClosed\",\n \"attributeName\": \"fill\",\n \"attributeValue\": \"#333333\"\n}"},{"id":"f9f17505.564b88","type":"ui_svg_graphics","z":"c199b9b6.017a2","g":"dea38dc1.3a8ca","group":"7deb7f7c.de4dd","order":2,"width":3,"height":2,"svgString":"\n\n","clickableShapes":[],"smilAnimations":[],"bindings":[],"showCoordinates":false,"autoFormatAfterEdit":false,"showBrowserErrors":false,"outputField":"payload","editorUrl":"//drawsvg.org/drawsvg.html","directory":"","panning":"disabled","zooming":"disabled","panOnlyWhenZoomed":false,"doubleClickZoomEnabled":false,"mouseWheelZoomEnabled":false,"name":"verClosed","x":870,"y":190,"wires":[[]]},{"id":"b9842ca1.7a2d6","type":"rpi-gpio in","z":"c199b9b6.017a2","g":"9fb89002.5b5b","name":"32-Opening","pin":"32","intype":"tri","debounce":"25","read":true,"x":100,"y":240,"wires":[["2c6747c3.3855f8"]]},{"id":"ffbc3276.5f7b78","type":"rpi-gpio in","z":"c199b9b6.017a2","g":"37454ed8.bb979a","name":"36-Closing","pin":"36","intype":"tri","debounce":"25","read":true,"x":90,"y":510,"wires":[["49f519a.fee9c68"]]},{"id":"9faf751d.055c28","type":"rpi-gpio out","z":"c199b9b6.017a2","g":"bd3964c9.d73fe8","name":"pin 22","pin":"22","set":true,"level":"0","freq":"","out":"out","x":700,"y":510,"wires":[]},{"id":"cd455311.b7c26","type":"trigger","z":"c199b9b6.017a2","g":"bd3964c9.d73fe8","name":"momentary","op1":"1","op2":"0","op1type":"str","op2type":"str","duration":"500","extend":false,"units":"ms","reset":"0","bytopic":"all","topic":"topic","outputs":1,"x":860,"y":460,"wires":[["9faf751d.055c28"]]},{"id":"60eec998.409068","type":"ui_template","z":"c199b9b6.017a2","g":"bd3964c9.d73fe8","group":"40f30843.03128","name":"Button","order":2,"width":4,"height":2,"format":"\n","storeOutMessages":true,"fwdInMessages":true,"resendOnRefresh":false,"templateScope":"local","x":670,"y":460,"wires":[["cd455311.b7c26"]]},{"id":"14fa76b1.f7f769","type":"ui_template","z":"c199b9b6.017a2","g":"bd3964c9.d73fe8","group":"40f30843.03128","name":"misc css","order":0,"width":"0","height":"0","format":"\n","storeOutMessages":true,"fwdInMessages":true,"resendOnRefresh":false,"templateScope":"global","x":890,"y":510,"wires":[[]],"info":"NOTE: Do not add comments - everything breaks!"},{"id":"4eddf1f8.72684","type":"ui_group","z":"","name":"text labels","tab":"81831aab.f2f568","order":1,"disp":false,"width":6,"collapse":false},{"id":"fbf8a8dd.af27e8","type":"ui_group","z":"","name":"Moving Label","tab":"81831aab.f2f568","order":3,"disp":false,"width":6,"collapse":false},{"id":"7deb7f7c.de4dd","type":"ui_group","z":"","name":"SVG LED group","tab":"81831aab.f2f568","order":2,"disp":false,"width":"6","collapse":false},{"id":"40f30843.03128","type":"ui_group","z":"","name":"Button","tab":"81831aab.f2f568","order":5,"disp":false,"width":6,"collapse":false},{"id":"81831aab.f2f568","type":"ui_tab","z":"","name":"GTO-500 Gate Opener","icon":"dashboard","disabled":false,"hidden":false}]
```
I just now added a msg.topic to each verification's "change to 1" change-node in order to clear the "blinking label" upon verification, and oddly enough, the error went away on the "verClosed" SVG-node. Still there on the "verOpen" node even though the code is identical. Before adding the msg.topic(s), the only thing that got passed to the SVG nodes was 4 lines of JSON code...
Russ
---
### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [14 November 2020 22:49 UTC](https://discourse.nodered.org/t/svg-node-error-message/35931/4 "2020-11-14T22:49:59Z")
> [@RASelkirk](#):
>
> enough, the error went away on the "verClosed" SVG-node.
> Still there on the "verOpen" node even though the code is identical
the change node is different! - there is nothing setting topic to an empty string
Add a topic and set it empty (like the other change nodes) - otherwise the topic will be passed through from the GPIO node and into the SVG node - which will try to interpret the topic as a command.
PS, I recommend you switch to deploy only changed nodes (unless you have a need to re-deploy all nodes with every tweak you make)
---
### Author:  [@RASelkirk](https://discourse.nodered.org/u/RASelkirk)
#### Post date: [14 November 2020 23:09 UTC](https://discourse.nodered.org/t/svg-node-error-message/35931/5 "2020-11-14T23:09:09Z")
That was it. So why were the SVG nodes griping about a msg.topic? At the time of the above pic there no msg.topics at all. I added them after to remove the "STOPPED" message in the blinking label.
Russ
---
### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [14 November 2020 23:11 UTC](https://discourse.nodered.org/t/svg-node-error-message/35931/6 "2020-11-14T23:11:20Z")
> [@RASelkirk](#):
>
> So why were the SVG nodes griping about a msg.topic
Because when you seen a msg to the svg node it expects a certain valid topic and/or payload to do something. It's telling you the msg you sent didn't work.
---
### Author:  [@RASelkirk](https://discourse.nodered.org/u/RASelkirk)
#### Post date: [14 November 2020 23:29 UTC](https://discourse.nodered.org/t/svg-node-error-message/35931/7 "2020-11-14T23:29:20Z")
Weird. The only msg's sent were 4-line JSONs in the msg.payloads to alter the SVGs, and those work perfectly. Those msg.topic lines weren't even added until after the fact, that's what's puzzling.
Russ
---
### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [14 November 2020 23:34 UTC](https://discourse.nodered.org/t/svg-node-error-message/35931/8 "2020-11-14T23:34:27Z")
Ok, so when you do a full deploy, all nodes are, well, recreated / reinitialised.
As you were not seting the topic in the change node, it was coming from an earlier node sending a message upon its re-initialisation, through the change node.
This is easy to verify. Add a debug node to every node before the svg & deploy all nodes. You will see what is happening.
---
### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [13 January 2021 23:34 UTC](https://discourse.nodered.org/t/svg-node-error-message/35931/9 "2021-01-13T23:34:29Z")
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