Installshield 2010 - On upgrade check its already upgraded to certain version -


i'm updating installer (basic msi) program v5.00.0000. need installshield check if it's upgrade, must on @ least 4.00.0034.

so if it's not installed, installs ok.

if it's on 4.00.0020, must return message please upgrade v4.00.0034 first.

thanks, ian.

examine ispreventdowngrades action , major upgrade item finds newer versions, or read on how prevent downgrades. can copy approach, tweaking instead find , error out on ones less 4.0.34.


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