(As of July 2025) According to the AD5940 GitHub repository, which is referenced in the ADuCM355 repository, there is no example for this board with the ARM Compiler version 6. To resolve this, download the ARM Compiler version 5.06, update 7 from the ARM Compiler Index. Then register and add the installed Arm Compiler 5 release by following the steps in the "Manage Arm Compiler Versions" section of the Keil MDK documentation.