Mach3 - Why all of a sudden am I getting an error message?

           ERROR, #Expand File not found at:
           C:\Mach3\ScreenSetMacros\.....\Masters\HeadersCopyRightAndLicenseNotice.m1s

I also get an error in the error window..."Scripter Compile Error. In M5.m1s

I've changed nothing but curious why I now get this error?