Error: "Server error in '/' Application. The file exists" when opening an attachment or using Search Exporter (4246898)

When attempting to open a message with an attachment the following error is obtained: "Server error in '/' Application. The file exists"

The same problem will occur if you try to use the Forward, Reply to Send to Me function. 

Search Exporter also fails to export items from the Archive with the error message found in the Archive Manager Application and Services Logs in Event Viewer. 

WORKAROUND

Manually delete the .tmp files

1. Login to the Archive Manager server

2. Navigate to C:\Windows\Temp

3. Delete all *.tmp files

4. Navigate to C:\Users\ArchiveMgr_Journal\AppData\Local\Temp\Archive Data Load Service

5. Delete all *.tmp files

6. You should now be able to open attachments.

NOTE: If necessary schedule a task to do this periodically.

This will allow you to view attachments, use Forward, Reply to Send to Me. If you're performing Search Exporter exports and the export is failing with  removing the .tmp files will allow you to continue.