Allows you to reference a specific positional value in the USER_ACSVAR parameter in PARMLIB member IGDSMSxx. Positional values in the USER_ACSVAR parameter are separated by commas. To request indexing, specify &USER_ACSVAR(n), where n is the position (a number from 1 through 3). &USER_ACSVAR without an index accesses the first positional value of the USER_ACSVAR parameter. An index of other than 1 through 3 generates an error condition with a reason code 2032 when you run the ACS routine.
