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Old 05-31-2012, 02:57 PM
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Gruff Gruff is offline
Bald Mountain Survivor

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Join Date: Aug 2003
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the safest thing to do is to insist the user uninstall the app completely, then reinstall.
It doesn't take all that much time to do so.

Many things can cause an upgrade to fail. Not the least of which is the components required for your app to run. I tried using the Click Once deployment that allowed upgrades across a LAN. It became so snarled up after a time that it stopped working altogether and I had to remove it from my development machine, Network Install Area, and all Client Machines before I could install any version of the app again. I Gave up on automatic upgrades after that.
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