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CANCEL

Command code
. Hex 35 - wait option

Fields required
. NCB_LANA_NUM  (number of the adapter)
. NCB_BUFFER@   (address of the NCB to be cancelled)

Field returned
. NCB_RETCODE
. NCB_CMD_CPLT

Final return codes
. Hex 00    - Command complete
. Hex 03    - Invalid command
. Hex 23    - Invalid number in NCB_LANA_NUM field
. Hex 24    - Command completed while cancel occurring
. Hex 26    - Command not valid to cancel
. Hex 40/4F - Unusual network condition
. Hex 50/FE - Adapter malfunction

Function
This command requests that the command, whose NCB can be found at the address
given by NCB_BUFFER@, be canceled.

The Cancel command return code indicates the status of the Cancel command, or
the reason for its failure. For example, a return code of hex 00 means only
that the Cancel command was issued. It does not mean the command to be
canceled was actually canceled. To determine the status of the command to be
canceled, you must check the return code for that command.

The following commands are not valid to CANCEL:
. ADD NAME
. ADD GROUP NAME
. DELETE NAME
. SEND DATAGRAM
. SEND BROADCAST DATAGRAM
. SESSION STATUS
. RESET
. CANCEL
Use caution when canceling a Send command because the session will be dropped.