Hi,

The Open Account AP Balance Listing report in r12 after TB pahse 4 :

Report shows no data if new Journal source other than payables is added
to the Definition code. 

It is important to have the latest Trial Balance code and files to avoid encountering any of the known issues. Please apply the following patches to get the latest Trial Balance Code and any dependent/related files (As of 02-Jul-09):

R12.0.x 

• Patch 6941347 (Prereq patch for Trial Balance Remodel Phase 4)
• Patch 7131705 (Prereq patch for Trial Balance Remodel Phase 4)  Bounce the apache server and restart the database after applying this patch.
• Patch 7622555
• Patch 8338523 (Includes Trial Balance Remodel Phase 4 patch 8291101.) 
• Patch 8340128

Please check that are you using latest code ie. AP TB Phase 4

Thanks,

Shrikant