# Error after upgrading

**URL:** <https://discourse.nodered.org/t/error-after-upgrading/13487>\
**Category:** General\
**Created:** [19 July 2019 17:02 UTC](https://discourse.nodered.org/t/error-after-upgrading/13487 "2019-07-19T17:02:38Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![drmibell](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/drmibell/32/8424_2.png) [@drmibell](https://discourse.nodered.org/u/drmibell)\
**Post date:** [19 July 2019 18:16 UTC](https://discourse.nodered.org/t/error-after-upgrading/13487/5 "2019-07-19T18:16:24Z")

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You could start with [this thread](https://discourse.nodered.org/t/maxlistenersexceededwarning-possible-eventemitter-memory-leak-detected-11-scanstop-listeners-added-use-emitter-setmaxlisteners-to-increase-limit-22/13400/5).

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_[View the full topic](https://discourse.nodered.org/t/error-after-upgrading/13487)._