Resource state requirements

A model application program must be active before it can be used to build dynamic application programs. You can activate a model application program as you activate other application programs by doing one of the following actions:

Issue a VARY ACT command.
Include the major node in which the model application program is defined in the configuration list that VTAM® uses when it is initialized.

By activating the model application program, you ensure that the state of the model application program is connectable, thus making it available to build dynamic application programs.

You cannot activate dynamic application programs with the VARY ACT command. Dynamic application programs are activated only by opening their ACBs. For a dynamic application program to successfully open its ACB, a model application must exist to build the dynamic application program, and that model application program must be connectable.