Numpy has issues with embedded Python. This also affects all libraries that use numpy, f.i. scipy, pandas, keras, tensorflow. Although numpy release 1.16.3 or above does start, it does not shut down properly, so you can only run it once with the Python bridge. Afterwards Zorro must be closed and restarted. Numpy was also reported to be not compatible with the R bridge, so r.h and contract.c cannot be included in numpy scripts. For overcoming all those issues, do not run numpy functions directly, but call the Python interpreter as in the example below.