oops. I missed Karel's response above. That worked! using CMSIS_OS v1 fixed my issue!

I'm having this same problem on the h745zi using the hal and autogenerated files. I've gotten the eth working by using dave's heap_newlib implementation. But now I block on configASSERT( !( ( pvItemToQueue == NULL ) && ( pxQueue->uxItemSize != ( UBas...