One more piece of information: My toolchain is “Keil ARMClang (Stand-alone) in C:\Keil_v5\ARM\ARMCLANG” Version 6.13.1. If I select “Keil ARMCC in C:\Keil_v5\ARMCC” Version 5.x, the assembly language file compiles with the “–via version.via”, but the rest of the project fails (I need to use the armclang compiler).