Change PO Error in Process

Hi All,

We are are on ECS and recently we did SP Upgrade and moved on to SAPKIBKT17 SRM 5.5.

The situation that we have is that PO was created and transfered to ECC without any issue. After this there were couple of Invoices and Confirmations posted against it. Now again the PO got changed and when it is trying to Push the change to ECC i am getting the below error messages:

1. Instance of XXXXXXXX Object Type Purchase Order could not be changed.

2. PO XXXXXXXXXX: Indicator for GR based Invoice Verification used not allowed.

I have verified the Vendor Master in ECC and the GR based IR flag is unchecked, ON PO the COnfirmation based INvoice creation flag is checked.

I wasnt able to find any relavent note for this. What are the steps to be followed to rectify this issue?

Thanks in advance for your valuable inputs.

- Satya