An LU-to-application program affinity is controlled by either VTAM® or the application program. An application program using generic resources can only use the CHANGE macroinstruction, to terminate the affinity between an LU and itself, if the application is the owner of the affinity. The application program controls this affinity if any of the following are true:

• LUAFFIN=NOTAPPL was not specified during session establishment and the session uses LU 6.2 sync point services.
• LUAFFIN=NOTAPPL was not specified during session establishment and the session uses LU 6.2 limited resource support.
• LUAFFIN=NOTAPPL was not specified during session establishment and the session uses LU 6.1 protocols.
• LUAFFIN=NOTAPPL was not specified during session establishment and the application program specified SETLOGON OPTCD=GNAMEADD with AFFIN=APPL specified on the NIB.
• LUAFFIN=APPL was specified during session establishment.