All versions of WiX can generate MSIs targeting any version of Windows
Installer. However, you will have to be very careful about using WiX
toolset custom actions (usually via Extensions) because we compile against
the latest security approved CRTs which sets our minimum OS level to what
is still in support by Microsoft (and sometimes a little less).

I bet you're using the WixUI and that has a custom action in it to verify
paths. You'll have to hack that out (basically, create your own UI) to get
it all to run on NT4.

On Mon, Apr 30, 2012 at 4:00 PM, Quinton Tormanen
<quint...@deltamotion.com>wrote:

> We have an older product that supports WinNT4 (with SP6+IE4). The
> installer for this product was built using WiX 3.0.5419.0. The last release
> was November 2010. We found that running the MSI file on WinNT4+SP6+IE4
> appears to work except that the user cannot get past selecting a target
> folder, because clicking Next always reports "Installation directory must
> be on a local hard drive" even for "C:\Program Files\RMCWin".
>
> Just today, I rebuilt the MSI file using the same source and WiX toolset
> (3.0.5419.0). However, this time, running the MSI file on WinNT4+SP6+IE4
> gives error 1620 ("This installation package could not be opened. Contact
> the application vendor to verify that this is a valid Windows Installer
> package") immediately.
>
> Both MSI files are marked with Schema 200, and the pristine WinNT4+SP6+IE4
> virtual machine has Windows Installer 2.00.2600.2 installed on it.
>
> Question #1: Any ideas on the source of either failure mode, or why it
> changed when building with the same source and toolset but on very
> different dates? The toolset and source are version controlled by Perforce.
>
> Question #1: What versions of WiX can generate Window
> NT4+SP6/WindowsInstaller2.00 compatible MSI files?
>
> Quinton Tormanen
> Software Engineer
> Delta Computer Systems, Inc.
> http://www.deltamotion.com<http://www.deltamotion.com/>
>
>
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-- 
virtually, Rob Mensching - http://RobMensching.com LLC
------------------------------------------------------------------------------
Live Security Virtual Conference
Exclusive live event will cover all the ways today's security and 
threat landscape has changed and how IT managers can respond. Discussions 
will include endpoint security, mobile security and the latest in malware 
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
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