My guess is that the install file is complaining about your processor architecture. There should be two DTI install files available on the software download page in Windchill. One is a 32-bit version of the installer, and one is 64-bit. Make sure you're downloading the 64-bit version. If you try to run the 32-bit installer on a 64-bit processor, you'll get this error message that you're currently seeing.
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