# Standard Library Version mismatch error **URL:** \ **Category:** B&R Software & Runtime\ **Tags:** automation-studio, automation-runtime\ **Created:** [November 13, 2025, 11:38am UTC](https://community.br-automation.com/t/standard-library-version-mismatch-error/9009 "2025-11-13T11:38:55Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Darshan\_Panchal](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/darshan_panchal/32/9644_2.png) [@Darshan\_Panchal](https://community.br-automation.com/u/Darshan_Panchal)\ **Post date:** [November 13, 2025, 11:38am UTC](https://community.br-automation.com/t/standard-library-version-mismatch-error/9009/1 "2025-11-13T11:38:55Z")
Program Converted from AS 3 to AS v4.10 and the library is same in both project but in 4.10 it shows this error AS 4.10.2.37 PLC 4PP450.1043-K01 AR I3.10 ![Screenshot 2025-11-11 170311](https://europe1.discourse-cdn.com/brcommunity/original/2X/0/0b71137e5ac23b197a25895611ba78304580671b.png) ---
**Author:** ![alexander.hefner](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/alexander.hefner/32/111_2.png) [@alexander.hefner](https://community.br-automation.com/u/alexander.hefner)\ **Post date:** [November 13, 2025, 11:59am UTC](https://community.br-automation.com/t/standard-library-version-mismatch-error/9009/2 "2025-11-13T11:59:28Z")
Hi, I think the problem is not the library itself but a wrong dependency setting in a user library that uses the standard library. Unfortunately I cant see the name of the module throwing the error in your screenshot. Do you have user libraries in your project? If yes please check their dependencies and update them to the version of the standard library in your actual project. Please see here for more details about user library dependencies: > **[B&R Online Help](https://help.br-automation.com/#/en/4/libraries%2Flibraries%2Fuserlibrary%2Fuserlibs_dependencies%2Fuserlib_dependencies.html)** Best regards! ---
**Author:** ![christoph.hilchenbac](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/christoph.hilchenbac/32/423_2.png) [@christoph.hilchenbac](https://community.br-automation.com/u/christoph.hilchenbac)\ **Post date:** [November 13, 2025, 1:32pm UTC](https://community.br-automation.com/t/standard-library-version-mismatch-error/9009/3 "2025-11-13T13:32:23Z")
I would agree to Alex that the root cause is not the standard library itself. Instead it is probably an own user library with outdated dependencies to this library. If you found out which library is responsible then have a look into its dependencies: ![image](https://europe1.discourse-cdn.com/brcommunity/original/2X/3/35a6c89d10425fc6a551f8d753b47b75948b309d.png) It is also possible that this is a library whose source code has been lost. In this case, you will need to obtain it again. Best regards, ---
**Author:** ![Darshan\_Panchal](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/darshan_panchal/32/9644_2.png) [@Darshan\_Panchal](https://community.br-automation.com/u/Darshan_Panchal)\ **Post date:** [November 14, 2025, 5:59am UTC](https://community.br-automation.com/t/standard-library-version-mismatch-error/9009/4 "2025-11-14T05:59:21Z")
![image](https://europe1.discourse-cdn.com/brcommunity/original/2X/4/48edc54891722cb42ced9f829ee391b3c6f4b70c.png) This is the Module error of “spclib” which is not available in B&R standard Libraries in AS4.10 Or Later ![Screenshot 2025-11-14 112207](https://europe1.discourse-cdn.com/brcommunity/original/2X/6/6f223da0be76586ba82d7bc60ad58ce7a9d6874f.png) And i checked for other libraries dependencies as well. ---
**Author:** ![alexander.hefner](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/alexander.hefner/32/111_2.png) [@alexander.hefner](https://community.br-automation.com/u/alexander.hefner)\ **Post date:** [November 14, 2025, 7:29am UTC](https://community.br-automation.com/t/standard-library-version-mismatch-error/9009/5 "2025-11-14T07:29:28Z")
Hi, ok, thanks. The named library is not delivered by B&R together with Automation Studio. It’s a user library that seems to be delivered only in binary format. So you need to get the sources of this library to change the dependency (or a compiled version with the right dependency) from the developer of this library. Best regards! Edit: in the screenshot I can see at least 3 more user libraries not part of Automation Studio libs, where no sources are available: - usr\_lib - vscreen - vcscrsht