[wix-users] How to downgrade a file to an older version in a patch?

[David Connet]

Yeah, that's a nasty issue. Even tho the uninstall is done first, MSI has already determined it doesn't need to update that file because of component version rules. So you end up with it missing. Running a repair will put it back.

As Rob says, "Going back in time is very hard."

Another option is breaking your upgrade path - recognize that the old version is there and error out with a message "you must uninstall XXX first." Very user unfriendly, but it works.

Dave




----- Original Message -----
From: Rob Mensching <rob at firegiant.com>
To: WiX Toolset Users Mailing List <wix-users at lists.wixtoolset.org>
Sent: Wednesday, November 16, 2016 3:27 PM
Subject: Re: [wix-users] How to downgrade a file to an older version	in	a	patch?

Oh, yeah, I may have forgotten about that issue. Going back in time is very hard. Sorry.

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-----Original Message-----
From: wix-users [mailto:wix-users-bounces at lists.wixtoolset.org] On Behalf Of Patterson, Brent
Sent: Wednesday, November 16, 2016 3:09 PM
To: WiX Toolset Users Mailing List <wix-users at lists.wixtoolset.org>
Subject: Re: [wix-users] How to downgrade a file to an older version in a patch?

Thanks, that seemed to work better, but still uninstalls after the newer one is installed.  However it's higher up in list of steps as per log.  But it resulted in the third party dll being missing from the install.  I'll try another value and see if it works better.

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