Various of the 'nmakehlp' commands executed by the
msvc++ build, e.g.:
nmakehlp -c -QI0f
prompt me with a windows dialog box titled "cl.exe - No
Disk", and a message "There is no disk in the drive.
Please insert a disk into drive D:.", with options
If this only happened once or twice it would be ok, but
it happens about 20 times when I do 'nmake -f makefile.vc'.