Same here. When regenerating with CubeMX 6.13.0, some functions disappear. These were present on the first generation of code. Re-generating deletes them and build fails. However, this is not always the case. Sometimes re-generation does work. Not su...
Very strangely this also happened to my own application after upgrade to CubeIDE to 1.6.1. I had never before had to comment out #define LWIP_RAND() ((u32_t)rand()) for my application to work. But now yes. Thanks for the tip, it solved my boot issue.
