# Codesys v3.5 SP21 patch 1 codemeter problem with Wago tp600 firmware 28

**URL:** <https://www.wago.community/t/codesys-v3-5-sp21-patch-1-codemeter-problem-with-wago-tp600-firmware-28/2136>\
**Category:** CODESYS\
**Tags:** tp600, codesys\
**Created:** [July 28, 2025, 11:09am UTC](https://www.wago.community/t/codesys-v3-5-sp21-patch-1-codemeter-problem-with-wago-tp600-firmware-28/2136 "2025-07-28T11:09:03Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![kkestass](https://avatars.discourse-cdn.com/v4/letter/k/ecccb3/32.png) [@kkestass](https://www.wago.community/u/kkestass)\
**Post date:** [July 28, 2025, 11:09am UTC](https://www.wago.community/t/codesys-v3-5-sp21-patch-1-codemeter-problem-with-wago-tp600-firmware-28/2136/1 "2025-07-28T11:09:03Z")

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Hello,  
just created new project ant tried to add visualisation, after that i cant download project to Wago PLC. every time get this error:

 ![image](https://us1.discourse-cdn.com/flex016/uploads/wago/original/2X/2/2ea4d94c9067d554208fcadb47860d2f9a6b6f93.png)

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**Author:** ![AdamReeve](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/adamreeve/32/59_2.png) [@AdamReeve](https://www.wago.community/u/AdamReeve)\
**Post date:** [July 28, 2025, 1:00pm UTC](https://www.wago.community/t/codesys-v3-5-sp21-patch-1-codemeter-problem-with-wago-tp600-firmware-28/2136/2 "2025-07-28T13:00:39Z")

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SP21 is only officially supported for Firmware 29, which is not yet released for TP600. I suggest returning to SP19.7 while using Firmware 28. There may be a workaround for the specific issue you show above, but other issues may arise - operation is not guaranteed.

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**Author:** ![kkestass](https://avatars.discourse-cdn.com/v4/letter/k/ecccb3/32.png) [@kkestass](https://www.wago.community/u/kkestass)\
**Post date:** [July 28, 2025, 2:37pm UTC](https://www.wago.community/t/codesys-v3-5-sp21-patch-1-codemeter-problem-with-wago-tp600-firmware-28/2136/3 "2025-07-28T14:37:57Z")

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Hello Adam,  
thank you, for your answer.  
I found workaround of this problem.

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**Author:** ![TomasD](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/tomasd/32/2042_2.png) [@TomasD](https://www.wago.community/u/TomasD)\
**Post date:** [July 28, 2025, 3:37pm UTC](https://www.wago.community/t/codesys-v3-5-sp21-patch-1-codemeter-problem-with-wago-tp600-firmware-28/2136/4 "2025-07-28T15:37:38Z")

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How to solve the problem? I am interested to know.

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<div class="post-metadata">

**Author:** ![kkestass](https://avatars.discourse-cdn.com/v4/letter/k/ecccb3/32.png) [@kkestass](https://www.wago.community/u/kkestass)\
**Post date:** [July 28, 2025, 4:07pm UTC](https://www.wago.community/t/codesys-v3-5-sp21-patch-1-codemeter-problem-with-wago-tp600-firmware-28/2136/5 "2025-07-28T16:07:45Z")

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in your application, POUs, library manager → Placeholders set CmpCodeMeter as none (right mouse click on library version and press none)

 ![image](https://us1.discourse-cdn.com/flex016/uploads/wago/original/2X/f/f364da376b0df101c61d8f1618ca1de976e71c82.jpeg)