epoch_12.pth is not a checkpoint file

[prayagpawar]

when i run python demo.large.py i get this error.
raise IOError('{} is not a checkpoint file'.format(filename))
OSError: work_dirs/faster_rcnn_RoITrans_r50_fpn_1x_dota/epoch_12.pth is not a checkpoint file
i suppose this is where u put trained model

[666zachary]

have you solved this？