Solved by Jimmy_Hall in post #5 
              
              
                I got the same error following the tutorial exactly, but the FasterRCNN documentation: 
https://github.com/pytorch/vision/blob/master/torchvision/models/detection/faster_rcnn.py 
suggests that  the featmap_names in the MultiScaleROIAlign should be a character, ‘0’, not an integer. I replaced 
roi_po…