I have been having real problems with using OS versions as a launch condition. My required condition is XP 32 bit only or any version of Vista or higher OS. It appears that
the issue is VersionNT is undefined on a 64 bit os and VersionNT64 is undefined on a 32 bit OS

This is my current version which does not work.
VersionNT=501 and VersionNT64<>501 or VersionNT>501 or VersionNT64>501
Any ideas?

I think you need something like:

VersionNT>=501 or VersionNT64>=600

meaning any 32-bit OS at XP or greater, or any 64-bit OS at Vista or later

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Phil Wilson

I agree with you that I need something like this. :-). Butssing "VersionNT>=501 or VersionNT64>=600 " as a launch condition allow the installer to launch on XP 64. My guess is undefine is breaking the >= comparison.

Has anybody made this work. I have posted questions close to this and several people have been helpfullwith answers but when tested none of them worked.

Something is broken then, because that condition looks correct to me.

VersionNT>=501 means "if the 32-bit NT version is XP or greater"

VersionNT64>=600 means "if the 64bit OS version is Vista or greater"

and or-ing these together should be correct.

In the Welcome dialog properties for your setup where it says something like "This will install [ProductName] ...." you can temporarily change this to display the properties byusing,say, "NT is [VersionNT] and NT64 is [VersionNT64] ......" so you can see the actual property values.

Make sure that you are getting the case right. These property names are case-sensitive.

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Phil Wilson

Thank you for the help on displaying the properities. I will test this and let you know what happens. In the past the tests I ran appeared toshow that VersionNT>=501 was true on 64 bit machines because VersionNT is undefinded on VersionNT64 bit machines. IT is supposed to be getting me a VM so it will be faster to test multiple OSs.