Everything works in Diagnostic Tools, except AP invoice data collection

Hi there,

We are using 11.5.10 and have Oracle Diagnostic Tools installed.  It has worked for us for years.  I have been using it for GL, AP and PO issues.  However, yesterday when I tried to run a report on AP invoice data, the page just gone.  Here is the detail:

-  log into Diagnostic Tools responsibility

-  click on advanced tab

-  choose Payables as application

-  open Invoices from left hand side penal

-  click on Invoice Data

-  enter responsibility id and invoice id (only those two are required in parameters)

-  click on run test

-  page is gone with message: the webpage can't be found