Hello,
the attribute PostProcess within a Profile can be used to define a script that should be executed after Embedded Wizard Studio has finished the code generation.
However, the script itself (in your case the build.bat file) is not part of Embedded Wizard Studio - it is part of your software environment. So I cannot say what happens there and what is going wrong.
Maybe one of your colleagues has created the file and can help you...
Best regards,
Manfred.