Thanks for the feedback Karl. I've been using a batch file to clear the SV cache to resolve other issues and support said this might help my issue. They also said it may be caused by locked files, my version of Acrobat, my internet speed or my computers are too slow. My problem is there are no indicators that the return did not make it to SV. Have you looked at the "Integration Queues" for each user in the portal to verify there are no files in them?