http://blogs.technet.com/alexshev/archive/2008/03/08/from-msi-to-wix-part-9-patching.aspxThe main page for the series is here . Introduction I'll show a very simple sample of small update . Directory structure for the sample The directory structure I am using for this sample is: Patching SmallUpdate RTM QFE Include Patch Project TestApp TestAppru-RUCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.technet.com/alexshev/archive/2008/03/08/from-msi-to-wix-part-9-patching.aspx#3101468Thu, 07 Aug 2008 02:07:16 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3101468Tony Juricic<p>Alex, if you can cover also the new Wix patching that would be just great! </p>http://blogs.technet.com/alexshev/archive/2008/03/08/from-msi-to-wix-part-9-patching.aspx#3258200Wed, 24 Jun 2009 13:59:22 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3258200Prabhakaran<p>Alex</p> <p>I am trying to produce a patch file. I created the patch file and when i run the Error.msi it shows be file missing errors which i hav'nt encountered before. </p> <p>I have set Compressed='no' under Package. I am also using Mergemodule in this package. Does the Merge Module support patch works? </p> <p>I hav'nt encountered any kind of file missing errors earlier, the only difference is I have set the Compressed='no' under Package. Does this change the behaviour of the Installer Package? If so then what about the vital files which are for the program. Where should we include those?</p> <p>Any suggestions?</p>http://blogs.technet.com/alexshev/archive/2008/03/08/from-msi-to-wix-part-9-patching.aspx#3280448Thu, 10 Sep 2009 22:24:51 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3280448Anidil<p>How do I add a custom action that is part of the upgrade MSI to the patch??</p>