Same issue here with 401RE and 429ZI boards tried exporting to uVsion5 but with same error cmsis_os2.h
Also when exporting sure enough that file and whole directory mbed-os\rtos\rtx5 is missing
Also mbed_rtos_storage.h, mbed_rtos1_types.h in mbed-os\rtos missing
Applies to OS5.6.x previous 5.5 all compile and export as expected
Wanted to use the 5.6 'tickerless' feature......
When I tried to compile a small sample project using Mutex, at the line
I get an error saying
I wonder if Mutex is going to be obsolete, or it's just another daily glitch?
moto