Not able to do GR/Confirmation

Hi Experts,

We are using Extended classic scenario 5.0 . For a particular PO we are not able to do GR . And in the confirmation screen that PO was not get displayed.

From the PO, the option " Confirm Performance of Service/Goods Receipt " was got checked and also " No further confirmations expected " was unchecked .

And there is no restrict in the code level i.e badi BBP_WF_LIST.

And there no problem with the roles.

Kindly advice to proceed !!!