-----Original Message-----
From: Phill Hogland [mailto:phogl...@rimage.com] 
Sent: Friday, April 25, 2014 11:30 AM
To: wix-users@lists.sourceforge.net
Subject: Re: [WiX-users] How implement installer to update single file ? 
Upgrade? Patch?

If you have the old MSI, there are a couple of options (but I am no expert).

If the old mis supports doing a /a layout then you can extract the files of the 
old msi to two folder tress, original and changed, change the files in the 
'changed' folder tree, and use torch to create a transform.

Or you can use orca in the old msi to find out which component the files is 
associated.  Then create a new msi with only all of the files (resources) of 
that component, using the same component GUID, and run that msi to update the 
file.  But the component must be identical to the component in the original 
package with regard to the guid, target path, and all resources included in 
that component.

I am just learning and experimenting with a similar situation, so others can 
provide more expert advice.



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