Importing MCNP .i file yields empty geometry – Cubit 2025.8

Hello Cubit / Coreform community,

I’m encountering a problem trying to import a MCNP input file (.i / .inp) into Cubit 2025.8 (licensed with a one-month evaluation license). When I use Import → MCNP (or via import cf_mcnp), a blank dialog box appears (no text or options in it), and after clicking “Finish,” no geometry or volumes show up in the model tree or view.Even after switching to a simple MCNP input file, the import still fails.

Thank you very much in advance for your time and help!