VBA- AssembleComponent works but not AssembleByCopy

[mtonsager]

The AssembleComponent command works, but if I substitute the AssembleByCopy command it no longer works and returns a pfcExceptions:XToolkitBadInputs error.  I'm only switching the two lines below:

Set asmcomp = assembly.AssembleComponent(rotormodel, Nothing)

If I replace the line above with the one below, it no longer works

Set asmcomp = assembly.AssembleByCopy("rtr2.prt", rotormodel, False)

[mtonsager]

Changing rtr2.prt to rtr2 got rid of the error, but now the new rtr2 model is assembled in empty, like it's not using rotormodel as a template