How to push exceptions via Transaction Source's post processing extension of Oracle Projects Account

Hi Team,

We would like to use post processing extension of 'a custom Transaction Source' in Oracle Projects Accounting.

We would like to push the validation exceptions to PRC: Transaction Import program so that it outputs the exception the way standard exceptions are shown.

We could not find the sample code to push the exceptions to this standard program 'PRC: Transaction Import'

could you please provide a sample code or let us know how we can push custom validation exceptions?

thanks, Ganesh