LBOUND returns a FIXED BINARY value that specifies the current lower bound of dimension y of x.
>>-LBOUND(x-+----+-)------------------------------------------->< '-,y-'
The value for y can be omitted only if the array is one-dimensional.
Under the CMPAT(V3) compiler option, LBOUND returns a FIXED BIN(63) value. Under the CMPAT(V2) and CMPAT(LE) compiler options, LBOUND returns a FIXED BIN(31) value.