Arduino for STM32

Thanks for the answer (v2.5.0), I hadn't seen the deprecation notice and the update to 2.7.1 installed without error or warning, which was a bit surprising. AVR and ATtiny environments still seem to work OK in the 32-bit environment.

Yes, my laptop supports 64-bit windows but as the environment and ...

As an occasional user of STM32 boards with Arduino I had some success in 2017 and 2022 doing stuff. Just came back and updated the STM32 core for a new project and cant do anything.... get the following message with IDE version 1.18.19 and STM32 core version 2.7.1

"AppData\Local\Arduino15\packages ...