The debug message for "enrollment" has an error that translates to a formatting error if `-vvv` is used: ```text Traceback (most recent call last): File "/idiap/resource/software/bob/envs/v300py36/lib/python3.6/logging/__init__.py", line 992, in emit msg = self.format(record) File "/idiap/resource/software/bob/envs/v300py36/lib/python3.6/logging/__init__.py", line 838, in format return fmt.format(record) File "/idiap/resource/software/bob/envs/v300py36/lib/python3.6/logging/__init__.py", line 575, in format record.message = record.getMessage() File "/idiap/resource/software/bob/envs/v300py36/lib/python3.6/logging/__init__.py", line 338, in getMessage msg = msg % self.args TypeError: %d format: a number is required, not str ``` The message should have a ``%s`` instead of ``%d`` for the model name.