An example of where this error may be returned is if a Status value received from another address space belongs to an error-space that is not known to this address space. Also errors raised by APIs that do not return enough error information may be converted to this error.
__init__( node_def, op, message, error_code=UNKNOWN )
The integer error code that describes the error.
The error message that describes the error.
NodeDef proto representing the op that failed.
The operation that failed, if known.
N.B. If the failed op was synthesized at runtime, e.g. a
Recv op, there will be no corresponding
object. In that case, this will return
None, and you should
instead use the
discover information about the op.
Operation that failed, or None.