Rama z-score failed failed. /net/marbles/raid1/dorothee/rerefine/cryoem/data_no_H/7r6l_24281/04_2024/7r6l_24281.pdb /net/marbles/raid1/dorothee/rerefine/cryoem/data_no_H/7r6l_24281/04_2024/7r6l_24281.map 2.85 Traceback (most recent call last): File "/net/marbles/raid1/dorothee/rerefine/cryoem/rerefine_script.py", line 440, in get_statistics self.json_data[p+'z_score'] = z_scores['W'][0] TypeError: 'NoneType' object has no attribute '__getitem__'