If VTAM® is allowed to decide whether to reload the communication controller, one of the following occurs:

• If the communication controller contains no program, VTAM loads the NCP into the communication controller.
• If VTAM decides that a load is not necessary, VTAM issues a message to inform you, and it performs no disk-related functions.
• If the communication controller already contains the NCP being activated, you might be asked whether the existing NCP should be refreshed with a new copy. If you specified AUTOSYN=NO on the PCCU definition statement in the NCP definition, VTAM does not automatically resynchronize itself with the existing NCP, but rather asks you whether resynchronization or reloading should occur. Otherwise, VTAM resynchronizes itself with the NCP without operator intervention and without reloading the communication controller.
• If the communication controller contains an NCP other than the one being activated, you might be asked whether the existing NCP should be replaced. If you specified VFYLM=YES on the PCCU statement in the NCP definition, you are asked to confirm that the communication controller should be reloaded. Otherwise, VTAM proceeds with the reload without operator intervention.
• If the communication controller contains a program other than an NCP (for example, an EP program in a channel-attached communication controller), the NCP activation fails. During activation VTAM attempts channel contact, but when the identification exchange fails, VTAM assumes that the communication controller might contain an EP program. VTAM then attempts to resynchronize with the assumed NCP. Activation of the channel link station fails when the resynchronization fails. This results in failure of the NCP activation itself. Another VARY ACT command specifying LOAD=YES can be entered to force loading of the NCP.