# tf.errors.CancelledError

## Class CancelledError

Inherits From: OpError

See the guide: Running Graphs > Error classes and convenience functions

Raised when an operation or step is cancelled.

For example, a long-running operation (e.g. tf.QueueBase.enqueue may be cancelled by running another operation (e.g. tf.QueueBase.close, or by tf.Session.close. A step that is running such a long-running operation will fail by raising CancelledError.

## Properties

### error_code

The integer error code that describes the error.

### message

The error message that describes the error.

### node_def

The NodeDef proto representing the op that failed.

### op

The operation that failed, if known.

N.B. If the failed op was synthesized at runtime, e.g. a Send or Recv op, there will be no corresponding tf.Operation object. In that case, this will return None, and you should instead use the tf.OpError.node_def to discover information about the op.

#### Returns:

The Operation that failed, or None.

## Methods

### __init__

__init__(
node_def,
op,
message
)


Creates a CancelledError.