To optimize any terminals or printers that an application region owns, install the product in this region as well. The Optimizer optimizes data streams when the data streams are being sent to or from the terminal. Optimization does not occur when the data streams are sent between regions.
If the COPRINT print or the COPOPT options VSAM files are used, they must be local if you start the Optimizer by using a PLTPI parameter for program system initialization. If the files are remote, a U601 abend results. This requirement is a CICS restriction. If a PLTPI is not used, both files can be remote.