Hi Vinita,
No matter approval is needed or not, FM BBP_PDC_SRC_DETERMINE will be used to tranfer this SC to sourcing by checking the customizing 'Define sourcing for product category'.
With the BADl BBP_SRC_DETERMINE it is possible to control the transfer to the sourcing cockpit.
You have to check from your side why breakpoint at this FM can't be reached or you may trace the whole process to see where this FM is called.
I can't logon to your system, so it is impossible to check why this function module can't be reached from my side.
Best regards,
Ivy