CCS/MSP430FR4133: Compilation Error while adding custom-made C source files in the demo examples

Tool/software: Code Composer Studio

Hi,

We are using MSP430FR4133 & developing CCS project including the demo examples. It build successfully till we add/change code in the demo files. But when we add a custom C source file, getting below error (There is logical or syntax error in the custom C source file).

"Errors in Source - Assembler Aborted
gmake: *** [FR4133_IR_BP_Learn.obj] Error 1
gmake: Target 'all' not remade because of errors."

Can we get help to identify or resolve above error.

Thanks

MT