Mark,
You could try using the Microsoft “Sysinternals” tools to trace where the failure is happening, though a useful starting point would be to check the DLL is where it says it is and it’s properties.
From the Rocket product matrix, the last version of 10.2 certified on Windows was 10.2.10 which went EOL in 2023 and was certified on:
XP (SP2)
VISTA
2008 (SP1)
2003 (SP2 R2)
2000 (SP4)
You may be in a hiding to nothing here - but the above may at least help identify the first stumbling block and allow you to move on. You could load a.Windows 2008 SP1 virtual machine if you really want to go with this old a release - though with all the usual caveats about the lack of current Windows security updates which ended in 2015 and the older SSL.security ciphers in 10.2.x and lack of security updates and patches.
I strongly recommend upgrading UniVerse to a current release.
Regards
JJ