@ptrblck Accuracy is fine if I remove the autocast clause.  Its just an EfficientNet B1 model.    The output of Accuracy is just 0, which is fine, I am not actually using that metric for this model, but obviously something has happened to z and perhaps there is a process to reverse it and so I can use it to further calculate my accuracy.  I can dig in and see where the number is being fudged, but I figure there may be something obvious I was doing wrong.