Lucid error messages

Sometimes you may run into hard to understand TensorFlow error messages.

Op only supports ... on device type CPU

When running a graph you may encounter ops for which there is no kernel for the current device your operation is running on. For example, a graph with a Maxpool operation may only be executable on a GPU when running in NCHW mode.

Example error message:

InvalidArgumentError (see above for traceback): Default MaxPoolingOp only supports NHWC on device type CPU

Suggested Fix: Run the operation on the supported device type, or change the original graph to use less device specific operations.