Hi All,

After doing some searching, it seems that the general understanding is that
Windows Installer does a poor job with exit codes returned when an MSI does
not complete "successfully" for some reason. A case that we have encountered
is where we are preventing downgrades for our install packages. When we
encounter this, Windows installer returns a 1603 error code. I can
understand some type of error code being returned being that the install did
not "complete" successfully. However, 1603 seems to be a pretty common error
code, and in some cases it is impossible to determine if the downgrade logic
was encountered, or if actually something "bad/fatal" happened that caused
the 1603 code.

Is it possible to instruct Windows Installer to return a specific error
code? For instance, in our downgrade scenario, would it be possible to exit
with a different code instead of the 1603?

Thanks.
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