# Method Not Found for Invoke Code

**URL:** <https://forum.uipath.com/t/method-not-found-for-invoke-code/446213>\
**Category:** Studio\
**Tags:** activities-panel, question, studio, system, activities\
**Created:** [June 7, 2022, 2:12pm UTC](https://forum.uipath.com/t/method-not-found-for-invoke-code/446213 "2022-06-07T14:12:05Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![Yoichi](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/yoichi/32/523754_2.png) [@Yoichi](https://forum.uipath.com/u/Yoichi)\
**Post date:** [June 9, 2022, 11:57pm UTC](https://forum.uipath.com/t/method-not-found-for-invoke-code/446213/7 "2022-06-09T23:57:29Z")

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Hi,

Which version of Studio and UiPath.System.Activities package do you use?

There is restriction for InvokeCode regarding version. So, can you try to downgrade it to 20.10?

> [@Select query help](https://forum.uipath.com/t/select-query-help/367057/47):
>
> @Shilpa_Mohanty @prasath_S @StefanSchnell Hi, I can just reproduce this problem in my environment as the following. I haven’t get the exact conditions for reproduction yet, but In Studio 20.10.9 with System.Activities package 21.10.2 this occurs. If downgrade System.Activities package to 20.10.4 (this is bundled version of Studio 20.10.9) , there is no error. So for now can you try to downgrade System.Activities package to 20.10.4, if you use Studio except the latest. Rega…

Regards,

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