# Cannot import ReferenceError

**URL:** <https://forum.inductiveautomation.com/t/cannot-import-referenceerror/67803>\
**Category:** Ignition\
**Tags:** perspective\
**Created:** [December 19, 2022, 7:47pm UTC](https://forum.inductiveautomation.com/t/cannot-import-referenceerror/67803 "2022-12-19T19:47:13Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![vrautomation](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/vrautomation/32/11155_2.png) [@vrautomation](https://forum.inductiveautomation.com/u/vrautomation)\
**Post date:** [December 19, 2022, 7:47pm UTC](https://forum.inductiveautomation.com/t/cannot-import-referenceerror/67803/1 "2022-12-19T19:47:14Z")

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Ignition 8.1.17

Hello all,

We have a view on a Perspective page that stop to work suddenly.

It seems, a transform script use the copy.py library, that use the weakref.py library, that failed to import ReferenceError from exception (from exceptions import ReferenceError)

![ReferenceError](https://us1.discourse-cdn.com/inductiveautomation/original/3X/1/6/168200c2bb4b05948ceb813b843522b5cac8f1b6.jpeg)

The same view works when I start the project on a redundant gateway...

Not sure what to do with that. Does anyone have an idea? Otherwise I will need to call the technical support.

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**Author:** ![Patrick\_Chanthilack](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/patrick_chanthilack/32/42479_2.png) [@Patrick\_Chanthilack](https://forum.inductiveautomation.com/u/Patrick_Chanthilack)\
**Post date:** [January 10, 2023, 7:42pm UTC](https://forum.inductiveautomation.com/t/cannot-import-referenceerror/67803/2 "2023-01-10T19:42:16Z")

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Hello vrautomation,

If you could check your pylib folder by navigating to C:\Program Files\Inductive Automation\Ignition\user-lib\pylib

Can you confirm if you have copy.py and weakref.py in this folder? If they are in the pylib folder I would suggest opening a support ticket so we can take a look at your project to confirm the issue.  
You can contact Inductive Automation Support by going to the link below.  
[https://support.inductiveautomation.com/hc/en-us](https://support.inductiveautomation.com/hc/en-us)

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<div class="post-metadata">

**Author:** ![vrautomation](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/vrautomation/32/11155_2.png) [@vrautomation](https://forum.inductiveautomation.com/u/vrautomation)\
**Post date:** [January 12, 2023, 3:36pm UTC](https://forum.inductiveautomation.com/t/cannot-import-referenceerror/67803/3 "2023-01-12T15:36:09Z")

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Yes the files are there.

I'll call the support.  
Thanks!

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<div class="post-metadata">

**Author:** ![Patrik\_Vogel](https://avatars.discourse-cdn.com/v4/letter/p/48db29/32.png) [@Patrik\_Vogel](https://forum.inductiveautomation.com/u/Patrik_Vogel)\
**Post date:** [March 3, 2026, 1:41pm UTC](https://forum.inductiveautomation.com/t/cannot-import-referenceerror/67803/4 "2026-03-03T13:41:11Z")

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Any news about this issue? I have the exact same Problem. I am running version 8.3.1

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<div class="post-metadata">

**Author:** ![vrautomation](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/vrautomation/32/11155_2.png) [@vrautomation](https://forum.inductiveautomation.com/u/vrautomation)\
**Post date:** [March 4, 2026, 2:25am UTC](https://forum.inductiveautomation.com/t/cannot-import-referenceerror/67803/5 "2026-03-04T02:25:21Z")

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The support ask to reinstall Ignition completely.

We will do it when we can do it…