Investigate Problem with Warning returned from Model

The following message can under certain circumstances be logged as a Warning on the model but it runs normally to the end and produces results. As far as I understood an error is then returned from the Worker.

/home/ramsis/repos/sfm_models/sfm_models/models/EM1/EM1.py:53: RuntimeWarning: invalid value encountered in log  A6 = N * np.log(b)