Need some help with getting an STL to import...

I’ve recently downloaded blender to try. I created a part in CoCreate and saved it to STL. I viewed it in SolidView and the object comes up perfect as I created it. I go into Blender and find it won’t import.

Where do I start? I went to the manual and it mentioned opening the file in a text editor and changing part of a line. Before I go doing that, I’d like some input on whether this is necessary or if I’m reading the instructions wrong.

In short, as before, where do I start?


This is from a dwg in progeCAD.
This is from the CoCreate. The latter will load into SolidView. It is that latter part I’m wanting to load in Blender.

Dr. C.