Ok, so I was directed to use more CAD-related files when importing(essentially) because the STL files I found kept giving me ‘mesh bodies cannot be selected’ errors. So I decided to grab a CAD file that had a .STEP extension. I imported it just fine. Looks good in the app, but I cannot export it as an STL file at all (either high quality or normal). I keep getting "Export failed. Failed to create file).
What do I need to do to STEP files to make it so that Shapr3D will export into an STL file without any issues?
I took a look at your file and yes, there are holes as @Robert had stated.
I too have come across a STEP file that, after import, I was able to work with and was unable to export and got the same error message as you did. Bottom line, the STEP file was corrupt for lack of a better word. A colleague was able to convert the broken STEP file to STL by using this free online service. Might be worth a try if you need to convert to STL.