When attempting to install Inventor Nastran, the install will consistently fail regardless of the version. This happened to me on a brand-new system, and it took quite some time to track down the root cause since the error that was shown was the ever useful “1603 Install Failed” error. I tried versions 2020-2023, and all failed with the same error.
The truly confounding aspect was that none of my teammates had this issue, and we all receive the same base build of laptop when we upgrade, so I had expected installation results consistent with those of my teammates. Since that was not the case, it was obvious that the issue was specific to my system.