Setup.exe Error

I've written a setup file for this program before with no problem, but since making some changes when I try to execute the setup. exe to install the program it stops with a message :

"$(DLLSelfRegisterEx) could not be registered because it was not found"

The Setup program un-installs what it has loaded and quits.

Why is it missing and where can I find it?

Moved To Application Deployment

Sounds like a bad .DEP file. See:

PRB: Out-Of-Date Dependency Information for MSCal.ocx

and

MOD2000: Deploying Package with MSCal.ocx Causes Error: "The file ...\$(DllSelfRegisterEx) Could Not Be Registered..."