What is PDMS Viewer software, what extensions it will take.

Autodesk Navisworks Simulate (not free) could open .rvm from pdms and save it to .nwd. this .nwd youcan oipen in Navisworks Freedom (it is free).
This is the cheapest way.

Autodesk Navisworks Simulate (not free) could open .rvm from pdms and save it to .nwd. this .nwd youcan oipen in Navisworks Freedom (it is free).
This is the cheapest way.