# WagoAppHTTP.FbHTTP\_Client\_Curl issue with FW29, PFC200

**URL:** <https://www.wago.community/t/wagoapphttp-fbhttp-client-curl-issue-with-fw29-pfc200/2296>\
**Category:** CODESYS\
**Tags:** pfc200\
**Created:** [September 16, 2025, 7:24am UTC](https://www.wago.community/t/wagoapphttp-fbhttp-client-curl-issue-with-fw29-pfc200/2296 "2025-09-16T07:24:23Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![JBO\_LV](https://avatars.discourse-cdn.com/v4/letter/j/3ec8ea/32.png) [@JBO\_LV](https://www.wago.community/u/JBO_LV)\
**Post date:** [September 16, 2025, 7:24am UTC](https://www.wago.community/t/wagoapphttp-fbhttp-client-curl-issue-with-fw29-pfc200/2296/1 "2025-09-16T07:24:23Z")

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Hi,

After update to Codesys SP21.1 and PFC200 to V29 experiencing issue that causing some sort of buffer overflow/infinite loop in POU, where WagoAppHTTP.FbHTTP\_Client\_Curl is called.

If breakpoints toggled at FbHTTP\_Client\_Curl then works fine in slow processing.  
After making the full POU cycle and removing all breakpoints then PLC hangs right after.

Tried downgrading to SP19.7 and FW28 and everything works like a charm.

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**Author:** ![WagoIcard](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/wagoicard/32/1508_2.png) [@WagoIcard](https://www.wago.community/u/WagoIcard)\
**Post date:** [September 29, 2025, 11:57pm UTC](https://www.wago.community/t/wagoapphttp-fbhttp-client-curl-issue-with-fw29-pfc200/2296/2 "2025-09-29T23:57:56Z")

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thanks for the report, please open a ticket with WAGO tech support and if possible also send the problematic project so they can test in house what the problem is.