NASTRAN-95 is distributed directly by NASA ( https://software.nasa.gov/software/LAR-16804-GS ), which links to GitHub ( https://github.com/nasa/NASTRAN-95 ).
Based on the information in this thread, it seems that the later MSC Nastran (updated coding) was distributed to UGS, but *not* to the public (this is not NASTRAN-95).
Rather, it seems that NASTRAN-95 is based on the Fortran77 code by COSMIC. We still don't know what updates were done up until 1995 (and were they done directly by NASA?). However, Bill has stated that has done some modification to the original COSMIC version and that it is rather difficult to work with.
Based on this information, it seems these comments are still valid:
https://www.mystran.com/forums/showthread.php?tid=4
Based on the information in this thread, it seems that the later MSC Nastran (updated coding) was distributed to UGS, but *not* to the public (this is not NASTRAN-95).
Rather, it seems that NASTRAN-95 is based on the Fortran77 code by COSMIC. We still don't know what updates were done up until 1995 (and were they done directly by NASA?). However, Bill has stated that has done some modification to the original COSMIC version and that it is rather difficult to work with.
Based on this information, it seems these comments are still valid:
https://www.mystran.com/forums/showthread.php?tid=4