Quote:
Property(S): ISSCRIPT_ENGINE_VERSION = 11.0.0.28844
Property(S): ISSCRIPT_VERSION_MISSING = The InstallScript engine is missing from this machine. If available, please run ISScript.msi, or contact your support personnel for further assistance.
Property(S): ISSCRIPT_VERSION_OLD = The InstallScript engine on this machine is older than the version required to run this setup. If available, please install the latest version of ISScript.msi, or contact your support personnel for further assistance.



Ignore this. Confusingly, MSI logging dumps out the values of all of the properties defined in the file. This includes most of the error messages, even if they're not actually being used.

Could you do the following:

msiexec /i foo.msi /l*v foo.log

...where 'foo' is the name of the MSI. Then, if you ZIP up the entire log file and post it here, we'll have a quick look at it.
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-- roger