The SETA symbol in the name field can be subscripted. If the same SETA symbol has not been previously declared in a GBLA or LCLA instruction with an allowable dimension, or has not been implicitly declared in a SETA instruction as a scalar (unsubscripted) variable symbol, then the symbol is implicitly declared as a local SETA array variable.

The assembler assigns the value of the expression in the operand field to the position in the declared array given by the value of the subscript. The subscript expression must not be 0 or have a negative value.