Checking for new signatures causes error in other programs?

Hello,

 

I have a VB6 application with an Access 2000 backend that is set to run a process at 3am daily.  This process backs up the Access db, queries it for different functions, calculates charges for customers, and writes them to the Access db.

 

When I have Norton AntiVirus set to check for new signatures at 3am as well, my process fails after the first task and I get this error:

 

-2147417848 Automation error The object invoked has disconnected from its clients

 

I am, of course, looking at what else could be running at that time as well, but so far I cannot find any other process.  Also, when I set the check for new virus signatures to some other time, or turn it off, I do not get a failure.

 

Anyone have any ideas?  Any assistance would be greatly appreciated.