VFYC

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   .-VFYC--=--YES--------.   
>>-+---------------------+-------------------------------------><
   |          .-YES----. |   
   '-VFYC--=--+--------+-'   
              +-IGNORE-+     
              '-NO-----'     

Specifies what action VTAM® should take if the correlators on the NCP load module and the NCP/EP definition facility (NDF) resource resolution table (RRT) do not match. When the correlators do not match, VTAM can take one of the following actions:
VFYC=IGNORE
Specifies that VTAM continues the current activation process.
VFYC=NO
Specifies that VTAM reloads the communication controller.
Note: If VFYC=NO, an interruption of all the NCP-attached hosts occurs. The NCP load module and the RRT in this host must match. If they do not match, a repeated reload of the NCP occurs until an operator deactivates it.
VFYC=YES
Specifies that VTAM asks the operator whether to reload the communication controller with the requested NCP, stop the activation process, or ignore the mismatch.

VFYC is checked only after a VFYLM check reveals a match between the load module name and the subarea.