Hi Kathleen - we've seen this happen when running the processing on an unsupported GPU. So I've got a few questions:
1. Are you using GPU or CPU to perform inferencing?
2. If GPU, which GPU?
3. Can you try this using your CPU (specify it in the enviornment settings), it will be a lot slower, so pick a small area to test.
4. What are the image properties of your input? (resolution, num bands, bit depth, source)