I am stuck on an error for a new preprocessing submission to the Training queue. It appears the 'cancer' field (the data label) is missing, causing an error in my code. Note on line 2 of STDOUT below, the absence of the 'cancer' field from the first row of the images_crosswalk.tsv file: STDOUT: 2017-03-08T21:44:53.958868599Z Treating : 000000.dcm STDOUT: 2017-03-08T21:44:53.958894768Z {'laterality': 'R', 'subjectId': '1', 'filename': '000000.dcm', 'examIndex': '1', 'imageIndex': '1', 'view': 'CC'} STDERR: 2017-03-08T21:44:53.958944509Z Traceback (most recent call last): STDERR: 2017-03-08T21:44:53.958955321Z File "main.py", line 2, in STDERR: 2017-03-08T21:44:53.958958611Z augment_data.augment_data() STDERR: 2017-03-08T21:44:53.958960923Z File "/augment_data.py", line 36, in augment_data STDERR: 2017-03-08T21:44:53.958980690Z if row['cancer'] == '1': STDERR: 2017-03-08T21:44:53.958983172Z KeyError: 'cancer' STDERR: 2017-03-08T21:44:54.014744229Z STDERR: 2017-03-08T21:44:54.014770070Z real 0m2.846s STDERR: 2017-03-08T21:44:54.014773368Z user 0m1.505s STDERR: 2017-03-08T21:44:54.014775873Z sys 0m3.340s This code works correctly on my machine. Any help would be greatly appreciated!