Got this step file from a customer. SWX 2020 gave me the "invalid record index" error. I did the trick in Notepad, replacing the "PRESENTATION_STYLE_ASSIGNMENT" lines with "PRES". It opened, but some of the components were way out of scale.

I requested a Parasolid .x_t file from the customer. This time I got the "inconsistent modeler version" error. Rather than embarrassing myself by asking the customer for yet another export format, I fired up my expired subscription of Fusion 360. Opened both files like a champ.

Any ideas why Solidworks doesn't want to play nice? I've tried turning 3D Interconnect on and off to no avail. Guess I'll renew my Fusion 360 subscription for a month to get through this project.