# NCCEVN_BLOCK_FAILED

Request to block calls on a line failed.

#### State transition

None.

#### Associated function

nccBlockCalls

#### Fields

Field | Description
ctahd | Line handle (context handle).
value | Reason for failure.

#### Reason codes

Reason code | Description
NCC_BLOCK_CAPABILITY_ERROR | The protocol does not support call blocking.
NCC_BLOCK_OUT_OF_SEQUENCE | The line is in a state that does not allow blocking.
NCC_BLOCK_TIMEOUT | Block command timed out.

#### Details

NCCEVN_BLOCK_FAILED indicates that a request to block calls on a line failed. This usually means that the function timed out before all existing calls on the line were released.

The event value field contains the reason why the request failed.