Try this way.Once Comment the Code for section access in the application and Reload Manually on server.
Go with the swuehl suggested post above . Removing the Shared File. Make a backup of Shared File.In a case if you require some objects created by user to be back.
Hope this helps,
If your QV app was running for quite a while and the error happened suddenly then windows may be the culprit by having a file locked:
Try Going in Computer Management - Shared Folders - Open Files.
Here you should see your file if locked
Right click on it, and close it
Run again your schedule and test.
Hope this helps.