@frenchbones
Hi, this usually happens because the file path is too big. You can try the following link 227 to increase the acceptable length of file path.
C:\\Users\\h_bas\\AppData\\Local\\Packages\\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\\LocalCache\\local-packages\\Python39\\site-packages\\caffe2\\python\\serialized_test\\data\\operator_test\\collect_and_distribute_fpn_rpn_proposals_op_test.test_collect_and_dist.zip'