This is not a complete answer to this question, however this minimal code example is able to reproduce the Invalid Handle error.

Ths example is using the ximea python API.

from ximea import xiapi

cam = xiapi.Camera()
cam.open_device()
cam.close_device()

cam.set_framerate(30.0)

This has different behaviour to the following code:

from ximea import xiapi

cam = xiapi.Camera()
cam.set_framerate(30.0)

Both example raise an error because the Camera.set_framerate function is raising an error, however something about the initialising and the de-initalising of the camera sets up the Camera object correctly so that the (? Correct) Invalid Handle error is returned instead of the ERROR 103: Wrong parameter type error being returned