In Projects (tppdm6500m000) session, I set Fixed Price Contract in the Agreement Type field and Progress Invoice in the Invoice Type field .

I generate installments by using the Create Progress Invoice Installments (tppin1210m000) session..

If I want to undo the installment amount, what should I delete to reverse the amount ??

I tried to delete the installment and revenue history then create a new installment again, but the previous installment amount were still there and will be cumulatively added into the new installment amount.. Causing wrong installment amount..

Any idea ??

Hi,
If your installments are not approved and transfered, you can try with deleting the existing progress entry and generate installments, it may work need to try.

Hi,
Thanks for your comment..
But what about if I have approved ?

Hi,
If you have just approved, no problem you can unapprove it and you can delete. If also you have transfered no problem go to session project invoice data (cisli2535m000) and select the installment line from specific unconfirme if it is confirmed. now the line status will be onhold, now you can delete the line now in our installment session (tppin4551m000), the installment can be deleted or edited.
I hope this will solve your problem.