error converting torchscript

[PathManager] Prefix 'manifold://' is already registered by <class 'iopath.fb.manifold.ManifoldPathHandler'>. We will override the old handler. To avoid such conflicts, create a project-specific PathManager instead.
[PathManager] Attempting to register prefix 'memcache_manifold://' from the following call stack:
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 783, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/data/users/ndhingra/fbsource/fbcode/buck-out/dev/gen/aab7ed39/ar_sharing/hand_tracking/tools/export_and_optimize#link-tree/deeplearning/aicamera/py_utils/fblearner_utils.py", line 10, in <module>
    g_pathmgr.register_handler(ManifoldPathHandler(), allow_override=True)
  File "/data/users/ndhingra/fbsource/fbcode/buck-out/dev/gen/aab7ed39/ar_sharing/hand_tracking/tools/export_and_optimize#link-tree/iopath/common/file_io.py", line 1404, in register_handler
    + "".join(traceback.format_stack(limit=5))

[PathManager] Prefix 'memcache_manifold://' is already registered by <class 'iopath.fb.manifold.ManifoldPathHandler'>. We will override the old handler. To avoid such conflicts, create a project-specific PathManager instead.
usage: export_and_optimize.par [-h] [--flow FLOW [FLOW ...]]
                               [--checkpoint_iteration CHECKPOINT_ITERATION]
                               [--output-dir OUTPUT_DIR] [--compare-accuracy]