Need to debug PTRV_EXPENSE_FORM. Have to find Driver Program

Hi experts

I have created a custom copy of PTRV_EXPENSE_FORM (ZPTRV_EXPENSE_FORM), which is working absolutely as required, except that manager is not able to view the entire information entered by the user. I want to debug it, but don't know how to find the driver program.

Everything except the Adobe Form is still SAP standard. I Would also appreciate if anybody can let me know if there could be issues other than technical with this problem!

Kind regards