Hmm. Am I to understand when I install pytorch1.0 the onnx support is not complete enough to convert a caffe2 model to ONNX?
Also, I asked about this in the ONNX forum. They said this conda-forge version is not being maintained  and asked to install from source.
Thanks @ptrblck for the advice.
Hmm. getting unsatisfiable conflict. ONNX requires python2.7 and I have python3.7 in the pytorch1.0 conda environment.