# Debug info Stopped Working

**URL:** <https://discourse.nodered.org/t/debug-info-stopped-working/100194>\
**Category:** General\
**Created:** [19 January 2026 19:24 UTC](https://discourse.nodered.org/t/debug-info-stopped-working/100194 "2026-01-19T19:24:36Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![acestu](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/acestu/32/90408_2.png) [@acestu](https://discourse.nodered.org/u/acestu)\
**Post date:** [19 January 2026 19:24 UTC](https://discourse.nodered.org/t/debug-info-stopped-working/100194/1 "2026-01-19T19:24:36Z")

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Hi, while trying to create a backup process for node red on my raspberry pi & firefox I noticed there was some updates, I installed the updates and now if I use any Debug nodes I don't get anything in the debug window, can they get switched off somehow ?

Thanks

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**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [19 January 2026 19:28 UTC](https://discourse.nodered.org/t/debug-info-stopped-working/100194/2 "2026-01-19T19:28:33Z")

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Refresh your browser to ensure you have latest deployed flow. Check to see if flows are running and that debug buttons are in the correct state.

If that doesn't work, check your browsers console log and your node-red log.

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**Author:** ![acestu](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/acestu/32/90408_2.png) [@acestu](https://discourse.nodered.org/u/acestu)\
**Post date:** [19 January 2026 19:36 UTC](https://discourse.nodered.org/t/debug-info-stopped-working/100194/3 "2026-01-19T19:36:49Z")

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Thanks Steve

I will check it

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**Author:** ![acestu](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/acestu/32/90408_2.png) [@acestu](https://discourse.nodered.org/u/acestu)\
**Post date:** [20 January 2026 08:42 UTC](https://discourse.nodered.org/t/debug-info-stopped-working/100194/4 "2026-01-20T08:42:36Z")

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Hi Steve,

I checked the Firefox console and found this:

```auto
Uncaught TypeError: RED.utils.truncateString is not a function
    processDebugMessage http://localhost:1880/debug/view/debug-utils.js:545
    handleDebugMessage http://localhost:1880/debug/view/debug-utils.js:395
    handleDebugMessage http://localhost:1880/#flow/c3d00b074cf26e86 line 2 > injectedScript:375
    onmessage http://localhost:1880/red/red.min.js?v=0547c66bc655:16

```

I am not sure if it is related but after a browser refresh the Debug info started reappearing

Thanks

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<div class="post-metadata">

**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [20 January 2026 08:58 UTC](https://discourse.nodered.org/t/debug-info-stopped-working/100194/5 "2026-01-20T08:58:28Z")

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> [@acestu](#):
>
> `Uncaught TypeError: RED.utils.truncateString is not a function`

`RED.utils.truncateString` was added ~1y ago - I suspect you have had a _partial browser cache_ issue coupled with a version upgrade or downgrade (to/from a version of node-red that does/does not have this utility function).

Just monitor the situation - should be 100% resolved for you.

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<div class="post-metadata">

**Author:** ![acestu](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/acestu/32/90408_2.png) [@acestu](https://discourse.nodered.org/u/acestu)\
**Post date:** [20 January 2026 09:00 UTC](https://discourse.nodered.org/t/debug-info-stopped-working/100194/6 "2026-01-20T09:00:36Z")

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Hi Steve

you are very knowledgeable

Thanks

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [3 February 2026 09:01 UTC](https://discourse.nodered.org/t/debug-info-stopped-working/100194/7 "2026-02-03T09:01:28Z")

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