[MaskRCNN bug] when MaskRCNN saves checkpoint after training, an error is reported

[Xiao-Yamin]

Question:
When MaskRCNN saves checkpoint after training, this variable arguments["save_checkpoints"] is used, but no value is assigned to it.

Solution:
In training\object_detection\pytorch\tools\train_net.py，add the following code:
arguments["save_checkpoints"] = cfg.SAVE_CHECKPOINTS

[ShriyaPalsamudram]

Sorry but the maskrcnn benchmark is dropped from the training benchmarks suite so this issue cannot be addressed at this time.