partially supervised instance segmentation

[xiaona123456]

How to start up partially supervised instance segmentation? Looking forward to your reply.

[xiaona123456]

Now, my dataset of train is box, and test is pixel label. It occurred an error when training.
The error is:
AttributeError: Cannot find field 'gt_masks' in the given Instance.

I would like to know what is the reason for this, this network is weak supervision, why is it so?