# ABB\_LIB\_Base semantic error in OmniCore RW8.1.1

**URL:** <https://tech-community.robotics.abb.com/t/abb-lib-base-semantic-error-in-omnicore-rw8-1-1/15140>\
**Category:** RAPID Programming\
**Tags:** error-handling\
**Created:** [September 15, 2026, 8:30pm UTC](https://tech-community.robotics.abb.com/t/abb-lib-base-semantic-error-in-omnicore-rw8-1-1/15140 "2026-09-15T20:30:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Karoly\_Varga](https://avatars.discourse-cdn.com/v4/letter/k/d6d6ee/32.png) [@Karoly\_Varga](https://tech-community.robotics.abb.com/u/Karoly_Varga)\
**Post date:** [September 15, 2026, 8:30pm UTC](https://tech-community.robotics.abb.com/t/abb-lib-base-semantic-error-in-omnicore-rw8-1-1/15140/1 "2026-09-15T20:30:54Z")

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May i ask for support in this semantic error topic.

During migration of ABB\_LIB\_Base.sys from RW6.9 to RW8.1.1 got the following error:

![image](https://europe1.discourse-cdn.com/flex005/uploads/robotics1/optimized/2X/1/165e731f8386d95e8cfb76177d3a1416cfefef86_2_690x64.png)

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**Author:** ![lemster68](https://dub1.discourse-cdn.com/flex005/user_avatar/tech-community.robotics.abb.com/lemster68/32/1945_2.png) [@lemster68](https://tech-community.robotics.abb.com/u/lemster68)\
**Post date:** [September 16, 2026, 4:15pm UTC](https://tech-community.robotics.abb.com/t/abb-lib-base-semantic-error-in-omnicore-rw8-1-1/15140/2 "2026-09-16T16:15:41Z")

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> [@Karoly\_Varga](#):
>
> ABB\_LIB\_Base.sys

Where did this module reside? Who wrote this module? Can you post the line of code from that module which is being pointed out?