Hi mastory,
Thanks so much for the feedback.
I'm attaching a screen shot and a photo. The screenshot shows the model as it appears upon importing the stl into Cura.
The photo is the actual print. Surfaces seem to be missing; only the fill is present. I'm afraid I don't anything about SW. I have published the dilemma to a SolidWorks forum, but so far haven't solved the problem. I think my collaborator may be creating the problem prints as inner and outer surfaces, which is subsequently combined, but I don't quote me on that. As said, some prints come out fine. A tech at a local 3d printer business suggested trying a Cura plug-in for SW. We haven't tried that option. Any thoughts would be much appreciated.