Unable to start node-red after installing modbus sample code

General
1

Hi all,
I recently copied the codes below related to modebus master and slave. Node red is not starting, and I am getting the error below. How do I go about solving or clearing the error?

9 May 21:46:27 - [info] Starting flows
9 May 21:46:27 - [error] [function:Pump 1 simulator] SyntaxError: Unexpected token )
9 May 21:46:27 - [info] Started flows
9 May 21:46:27 - [red] Uncaught Exception:
9 May 21:46:27 - Error: listen EADDRINUSE: address already in use 0.0.0.0:10502
at Server.setupListenHandle [as _listen2] (net.js:1280:14)
at listenInCluster (net.js:1328:12)
at doListen (net.js:1461:7)
at process._tickCallback (internal/process/next_tick.js:63:19)

2

Firstly, no node should crash node-red, please raise an issue in the GitHub repo.

Next, start node-red in safe mode, edit your flow then deploy.

Search the forum, internet or read the docs for how to start safe mode.

3

Thank you Steve.
I started in safe mode. I made the necessary changes, then deployed. Problem solved.
Thanks again for your help.

4

No problem. Did you raise an issue on the repo? Would be good for all future users for this to be fixed.

5

It's a known issue. I don't think you can run both slave and master as they can't both "grab" the port.

1 Like
6

Cheers. Then perhaps @Zaza should leave a "me too" type of comment to add some weight behind it & let the Dev know it's not a one off?

7

yeah - like shouting at devs really motivates them :wink:

8

No of course not but if the dev believes it to be a one off concern - they might think its the users environment & not put too much time or thought into it. but if all users at least +1 or "me too" an issue (and the dev gives a monkeys) then it might re-order priorities.

PS, I know you know what i mean :wink:

9

Yes, I raised it in the GitHub repo.
I hope that someone will take note.

1 Like
10

Yes I know what you mean. But a +1 without any additional help/context/diagnostic is not moving things forwards.

11

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.