trace_printf using OS_USE_TRACE_SEMIHOSTING_DEBUG works fine with Eclipse and STM32F405, but not with STM32F446 and System Workbench

[arnold_w]

I have two electronic products that use OS_USE_TRACE_SEMIHOSTING_DEBUG:

   Microcontroller  IDE 

1. STM32F405     Eclipse 

2. STM32F446     System Workbench

I use ST-LINK/V2 to debug both of them and this works great. If I insert trace_printf("Hello there") first in main then I see "Hello there" in the console window of the STM32F405 project, but nothing happens in the STM32F446 console window. How do I even begin to debug this?