We have some asp sites that use the 8.5 version of imanagedll to get copies of documents from the DMS database.  They've worked fine for a long time.  A few days ago, this stopped working in our development environment -- one day it worked, the next it didn't.  It doesn't appear that any changes were made in the environment, but a lot of people can touch it, so it's possible something was done that I'm not aware of.
 
The error is thrown on a line of vbscript: 
 
objDoc(objDoc.count).GetCopy DownloadDirectoryPath & "\" & sFileName ,nrNativeFormat
 
The path and file name are valid.  There are no errors connecting, creating a session, searching for the document, etc; the error just occurs on this GetCopy.
 
Can anyone shed some light on this?