CTLPAGES specifies the size of P1 pool. CTLPAGES is automatically
    changed only when the process logical name table, DCL symbols, or
    some layered products require an increase in the size of the P1
    pool area.

    This special parameter is used by HP and is subject to change. Do
    not change this parameter unless HP recommends that you do so.

    CTLPAGES is an AUTOGEN parameter.