# Node red s7 uncaught error
**URL:** https://discourse.nodered.org/t/node-red-s7-uncaught-error/4018
**Category:** General
**Created:** [16 October 2018 05:25 UTC](https://discourse.nodered.org/t/node-red-s7-uncaught-error/4018 "2018-10-16T05:25:42Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@kavi](https://discourse.nodered.org/u/kavi)
#### Post date: [16 October 2018 05:25 UTC](https://discourse.nodered.org/t/node-red-s7-uncaught-error/4018/1 "2018-10-16T05:25:42Z")
we are using 10 s7 nodes in node red. node red is crashed frequently due to the uncaught error with the below error message
""
9 Oct 19:41:29 - [red] Uncaught Exception:
9 Oct 19:41:29 - Error: write after end
at writeAfterEnd (\_stream\_writable.js:195:12)
at Socket.Writable.write (\_stream\_writable.js:242:5)
at Socket.write (net.js:657:40)
at NodeS7.onISOConnectReply (/usr/lib/node\_modules/node-red-contrib-s7/node\_modules/nodes7/nodeS7.js:306:17)
at Socket. (/usr/lib/node\_modules/node-red-contrib-s7/node\_modules/nodes7/nodeS7.js:262:26)
at emitOne (events.js:96:13)
at Socket.emit (events.js:188:7)
at readableAddChunk (\_stream\_readable.js:176:18)
at Socket.Readable.push (\_stream\_readable.js:134:10)
"""
please help us to rectify that issue, thankyou
---
### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [16 October 2018 06:04 UTC](https://discourse.nodered.org/t/node-red-s7-uncaught-error/4018/2 "2018-10-16T06:04:01Z")
Which version of node red and node.js? Also which OS?
If using a recent version of node red and a recommended version of node.js then you should report an issue against that node. Assuming you have checked there is not one reported already.
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### Author:  [@kavi](https://discourse.nodered.org/u/kavi)
#### Post date: [22 October 2018 07:09 UTC](https://discourse.nodered.org/t/node-red-s7-uncaught-error/4018/3 "2018-10-22T07:09:49Z")
hi colin,
i am using the node-red with version of v0.16.2 and using the node-js with version of v6.12.3. the os which i use is a linux i386
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### Author:  [@knolleary](https://discourse.nodered.org/u/knolleary)
#### Post date: [22 October 2018 07:37 UTC](https://discourse.nodered.org/t/node-red-s7-uncaught-error/4018/4 "2018-10-22T07:37:21Z")
Hi @kavi
As Colin suggested, this is an issue with the error handling in the node-red-contrib-s7 module.
You first need to check you have the latest version of that module. Then you should raise an issue against the node on GitHub so it's developers can help you.
> **[netsmarttech/node-red-contrib-s7](https://github.com/netsmarttech/node-red-contrib-s7)**
>
> A Node-RED node to interact with Siemens S7 PLCs. Contribute to netsmarttech/node-red-contrib-s7 development by creating an account on GitHub.
It's also worth noting you are on quite an old version of Node-RED - but that will be unrelated to the error handling in the s7 node.