That's correct.

http://blogs.msdn.com/b/heaths/archive/2011/04/02/10131862.aspx
See the section "A single change will reinstall the entire parent feature"

-----Original Message-----
From: john.burak [mailto:john.bu...@telvent.com] 
Sent: 07 February 2012 00:15
To: wix-users@lists.sourceforge.net
Subject: [WiX-users] MSP, whole features getting reinstalled

I'm creating my first MSPs.  It appears that if a single component changes
then all other components in the same Feature are reinstalled/repaired when
the patch is applied.  Is that correct behavior?

Backstory: I have some components that install Services.  These components
do not change in the new version and the MSP doesn't transform them (I
checked in Orca).  It appears that since other components in the same
feature are changed then the Services are getting reinstalled. This causes
the Services' user-customized settings to be lost.  The MSP replaces a
single DLL and adds a bunch of fileVersion rows to the MsiAssemblyName
table.  The fileVersion rows seem to be the culprit causing the Services to
get reinstalled.

If anyone knows, let me know if this is normal behavior or if it sounds like
I'm doing something wrong.

Thanks!

- John Burak

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