# Node-red-node-serialport : request maxListners
**URL:** https://discourse.nodered.org/t/node-red-node-serialport-request-maxlistners/85146
**Category:** General
**Created:** [2 February 2024 14:29 UTC](https://discourse.nodered.org/t/node-red-node-serialport-request-maxlistners/85146 "2024-02-02T14:29:19Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Nadhir](https://discourse.nodered.org/u/Nadhir)
#### Post date: [2 February 2024 14:29 UTC](https://discourse.nodered.org/t/node-red-node-serialport-request-maxlistners/85146/1 "2024-02-02T14:29:19Z")
I'm using node-red-node-serialport : serial request Node to connect to an external instrument , I'm using the Node multiple times with in a subflow and using the subflow many times in my flows , console log is throwing an error : 2 Feb 14:03:48 - [info] Starting flows
2 Feb 14:03:49 - [info] Started flows
(node:12928) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 data listeners added to [EventEmitter]. Use emitter.setMaxListeners() to increase limit
(Use `node --trace-warnings ...` to show where the warning was created)
(node:12928) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 timeout listeners added to [EventEmitter]. Use emitter.setMaxListeners() to increase limit
(node:12928) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 ready listeners added to [EventEmitter]. Use emitter.setMaxListeners() to increase limit
(node:12928) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 closed listeners added to [EventEmitter]. Use emitter.setMaxListeners() to increase limit
I undrestand that the error is related to serial request Node ,and does any one suggestion on how to fix it
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [2 May 2024 14:29 UTC](https://discourse.nodered.org/t/node-red-node-serialport-request-maxlistners/85146/2 "2024-05-02T14:29:21Z")
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