>One of my EXE is calling some sub EXEs. However, in those sub EXEs, some calls are made to the main EXE where the main functions are stored.
>
>How can we avoid those unknown references when compiling the sub EXEs? We are getting "Unknown MYPROC - Undefined". This is requiring us to press Ignore when compiling.

Another way besides David's:

DO ('ProcInOtherEXE')

This also prevents adding the EXE to your project.