Hmm, I can’t find a copy of that file with that #error message in. I’m
going to assume it is coming from the fact that the asm file in
including FreeRTOSConfig.h, and that FreeRTOSConfig.h in including
iolpc2129.h – in which case the #error might be in iolpc2129.h.
Alternatively it might be a compiler version mismatch issue.
If iolpc2129.h contains something the assembler can’t cope with then you
can use a guard around the header to ensure it is only included when .c
files are compiler rather than assembly files: