Automated build problem

[BillArnette]

I am trying to set up an automated build of my software. I created a .bat file which is run by Task Scheduler. The .bat file creates a build directory, gets the VBP build file from SourceSafe into the build directory, and invokes VisBuildCmd.exe on the VBP build file.

Frequently the build fails and VisBuildCmd.exe gives a 'class not registered' error. If I run the .bat file manually the next morning, the build succeeds.

Any ideas what is going wrong?

TIA,
Bill