IST2321I

Explanation
 VTAM® issues
this message during START processing or in response to a MODIFY VTAMOPTS
command when the value of the TDUDIAG start option is not correct.
 Valid values for TDUDIAG are ALWAYS, NEVER, or a numeric value.
 See
the TDUDIAG start option information in z/OS Communications Server: SNA Resource Definition
Reference. 

System action
  If the error occurred during START processing, VTAM issues message IST1311A to prompt you for
the correct value of the TDUDIAG start option.
If the error occurred in response to a MODIFY VTAMOPTS command, VTAM ignores the TDUDIAG start
option and processing continues

Operator response
 If the error occurred during START processing, enter a valid value
for the TDUDIAG start option in response to IST1311A. You can also
enter a blank if you want to accept the default value for the TDUDIAG
start option. 
If the error occurred in response to a MODIFY VTAMOPTS command,
enter the command again with a valid value for the TDUDIAG start option.

System programmer response
 If the error occurred during START processing, correct the value
for the TDUDIAG start option if TDUDIAG is coded in an ATCSTRxx file.
If the error occurred in response to a MODIFY VTAMOPTS command,
no further action is required

User response
 Not applicable.

Problem determination
 Not applicable.

Source
 z/OS® Communications
Server SNA

Module
 You can display the module that issues a SNA message
in the message by setting the MSGMOD start option to YES.  See Adding the originating module to the message text for more information about the MSGMOD
start option.

Routing code
 2

Descriptor code
 5

Automation
 Not recommended.

Example
  IST2321I TDUDIAG VALUE MUST BE NUMERIC, 'ALWAYS', OR 'NEVER'       