I've looked into this further and I think the problem is starting with the
initial patch. I noticed in the logs that the patch appears to be
installing the existing application files when it is run. Upon removal the
log shows that the application files are being removed (which should happen
if the patch adds files). Also additional patches do not remove files but
overwrite where applicable during their uninstall. Of course if this is the
case it raises another question as to why the patch is installing existing
application files that aren't being modified by it in the first place.
XorPtr wrote:
>
> Hi,
>
> I've stumbled across a situation that has me confused and questioning my
> understanding of the windows installer. I've currently created a patch
> for a company product, the first patch we're releasing for it. The patch
> seems to work fine however when I attempt to uninstall the patch it
> removes almost all of the binary files accompanying our product making it
> unusable after the patch is installed. Reinstalling the patch naturally
> fixes the problem.
>
> The patch is installed with an EXE wrapper which runs the following
> command:
>
> msiexec /p "[path ...]\Patch.msp" REINSTALL=ALL REINSTALLMODE="emus" /L*v
> "[path ...]\patch.log"
>
> I've also tried REINSTALLMODE="omus" with similar results.
>
> My attempts to uninstall the patch have been made both through the control
> panel and the command line with the command:
>
> msiexec /uninstall {patch-guid} /package {product-guid} /passive /L*v
> C:\uninstall.log
>
> Both have the same result, the logging from command line shows files are
> being removed but I haven't found any information suggesting why this is
> being done. I strongly suspect some of the files being removed are not
> even being modified by the patches initial install. If anyone has any
> insight or suggestions they would be very much appreciated. Thanks in
> advance!
>
> Jim.
>
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