You must specify the MAXWSCLIENTS parameter in the MACHINES section of the UBBCONFIG file. MAXWSCLIENTS is the only parameter that has special significance for ARTICTL. MAXWSCLIENTS tells the Oracle ART at boot time how many access slots to reserve exclusively for 3270 terminals.

For MAXWSCLIENTS, specify the maximum number of 3270 terminal that may connect to a node. The default is 0. If not specified, terminal may not connect to the machine being described.

The syntax is MAXWSCLIENTS=number.