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fredliu
Level 5
‎Jun 16, 2011 03:41 AM

prevent upgrade from high version to low version

Hi,
I am using installshield2009 basic msi.
Now I have two installers, version of one is 5.0 another is 6.0, I can upgrade from 5.0 to 6.0 as expected, but I can also upgrade from 6.0 to 5.0, I donot want to this happen, so how can i set some property to prevent this?

Thanks
Fred
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