object_detection_incremental_training.ipynb

Hangs on the following commented out command that also requires user input:
#python /tools/im2rec.py --pack-label --num-thread 4 your_lst_file_name /your_image_folder

When this command is skipped, training completes.

Throws the following error during inference:
ValidationError: An error occurred (ValidationError) when calling the InvokeEndpoint operation: 1 validation error detected: Value at 'body' failed to satisfy constraint: Member must not be null

Start with object_detection_incremental_training.ipynb and run the notebook while checking the commented im2rec.py command and the inference cell. Investigate why skipping that command allows training to finish but produces a null body for InvokeEndpoint. Done means the notebook completes training and inference without requiring unintended input or raising the reported ValidationError.

Written by the indexing model from the issue text.