iSupplier - Create Invoice

Hello All,

I am using iSupplier and creating an invoice through the iSupplier Internal View responsibility. I select on Create an Invoice with PO and enter my supplier and the PO#.  Then I click go to search for the lines to invoice.  Once I click go, I receive an Error Page.  The details of the error are not very helpful in this case. Has anyone else run into a similar issue that may have been caused by a missing setup, etc.  We are on R12. 

Thanks.