I have some SW parts, which were originally STL files. That is,  I opened the STL file, and saved it as a SolidWorks Part file.

However, whenever i attempt to use those files in an assembly, those parts are immovable.

• They are not fixed.
• If I use the "Move Component" command, it will not permit me to select those parts.
• If I attempt to use any mates, no part of those parts are selectable.

Is this a limitatin of SW, that you cannot move or mate to imported STL files?

Thanks for any advice.

-Joe