importing OBJ model repeated "invalid function call"failures

Wishgranter wrote:

Hi Julie Scott

check the mesh integrity. if remember Blender had some issues with proper OBJ exports. If possible use Meshlab or Zbrush and import/export the OBJ

Meshlab keeps crashing when exporting obj files. Zbrush is out of our price league for now. If you know of any other programs that can help, please recommend them.

I am simply trying to close holes on the bottom of my models, and I keep running into issues at every turn. The information that is available online is hard to find, and doesn’t exist in only one place.
I finally fiogured out how to close mesh holes in Blender, only to have the import-export function repeatedly fail on me, randomly. Sometimes obj files exported from Blender work in Reality Capture, sometimes not, and Mesh Integrity does not seem to matter.
RealityCapture really ought to have a function to make closing holes in meshes possible within the program. At least please provide a tutorial for the various ways it is possible to make meshes watertight.