GOS Attachment List is in Active or do not display Attachments:

This problem is because SAP does not checks for all published application objects whether there are attachments or not.

In order to make the SAP check this.

In TC->SM 30 use the table SXPARAMS.

Create new  Parameter: GOS_ATTA_CHECK_ALL  with Value: X

  Before the attaching a file that Attachment List is empty  for Purchase Order “4500017510”, as there is either are no above parameter placed in the SXPARAMS or no documents yet attached .

Through TC->SM30 for table SXPARAMS, Parameter GOS_ATTA_CHECK_ALL  is maintained with Value: X

Document attached through OAOR

Now the attachment shows up through Attachment list

Similar way they should show up all attachments in the Attachment list for other Purchase documents previously Attached.