What is the tolerance on imported forces/moments?

This is my first post. I'm relatively new to SimSolid.

I'm trying to understand the tolerances for imported forces and moments. I have some larger assemblies where I'll need to import a few dozen loads/moments onto a model. I can see through testing that with a certain amount of error the force will fail to apply. How does SimSolid determine this? Is it a fixed tolerance or a portion of the model size? How close does the imported X, Y, Z point have to match model geometry? Are imported forces point loads at the specific location?

I would appreciate any guidance on these questions.