# Library Issue? - Ecockpit

**URL:** <https://www.wago.community/t/library-issue-ecockpit/211>\
**Category:** CODESYS\
**Tags:** pfc200, ecockpit, codesys\
**Created:** [August 8, 2022, 9:46pm UTC](https://www.wago.community/t/library-issue-ecockpit/211 "2022-08-08T21:46:10Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![RBSI](https://avatars.discourse-cdn.com/v4/letter/r/c57346/32.png) [@RBSI](https://www.wago.community/u/RBSI)\
**Post date:** [August 8, 2022, 9:46pm UTC](https://www.wago.community/t/library-issue-ecockpit/211/1 "2022-08-08T21:46:10Z")

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Hello Everyone,

I am working on a pre-built project on ecockpit and facing these build errors, is this can be because of library is not up-to date? i am clueless on how to investigate this issue.

In one of the declared variables i have this following statement which i believe might be the source of it.

oCanRx11BitStatus : WagoSysErrorBase.FbResult;

Please let me know how to approach this problem. Thanks.

 ![Library Error](https://us1.discourse-cdn.com/flex016/uploads/wago/original/1X/f69041eb10adf837e7c1fbd83a32f53413812de1.png)

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**Author:** ![WagoDamRud](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/wagodamrud/32/258_2.png) [@WagoDamRud](https://www.wago.community/u/WagoDamRud)\
**Post date:** [September 19, 2022, 9:41am UTC](https://www.wago.community/t/library-issue-ecockpit/211/2 "2022-09-19T09:41:13Z")

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You should add information about version of e!COCKPIT, device FW and PLC type you have in the project 😉  
It seems that _WagoSysErrorBase_ is in version 1.6.2.5, which is not compatible with _WagoTypesErrorBase_ in version 1.6.0.0.  
_WagoSysErrorBase_ needs _I\_ResultProperties_ from _WagoTypesErrorBase_  
 ![image](https://us1.discourse-cdn.com/flex016/uploads/wago/original/1X/3c39123a83bdb882e54ac8e86c11623fe14200b0.png)  
Just choose from “Placeholders” newer version of _WagoTypesErrorBase_ (eg 1.6.2.0)

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**Author:** ![Lesurmig](https://avatars.discourse-cdn.com/v4/letter/l/f17d59/32.png) [@Lesurmig](https://www.wago.community/u/Lesurmig)\
**Post date:** [July 17, 2023, 7:57pm UTC](https://www.wago.community/t/library-issue-ecockpit/211/3 "2023-07-17T19:57:44Z")

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Where looking oldest version WagoTypesErrorBase?