Try adding UNIQUE to the cluster definition.? Also, move the space allocations to the data and index components. ? like this:
DEFINE CLUSTER??????????????????????????????????? -????????????????????????? ?
???????? (NAME(HERC02.VSAM.EXAMPLE1) INDEXED??????? -????????????????????????? ?
???????? VOLUMES(VSAM01)??????????????????????????? -????????????????????????? ?
???????? RECORDSIZE(80 80)????????????????????????? -????????????????????????? ?
???????? KEYS(10 0)???????????????????????????????? -????????????????????????? ?
???????? FREESPACE(5 5)???????????????????????????? -????????????????????????? ?
???????? CISZ(4096)???????????????????????????????? -????????????????????????? ?
???????? REUSE?? -
UNIQUE ????????????????????????????????? -????????????????????????? ?
???????? )????????????????????????????????????????? -????????????????????????? ?
???????? DATA (NAME (HERC02.VSAM.EXAMPLE1.DATA) -
???????? TRACKS(1 1))??? -????????????????????????? ?
??????? INDEX (NAME (HERC02.VSAM.EXAMPLE1.INDEX)
???????? TRACKS(50 15))
Since you don't have a VSAM dataspace, you must use the UNIQUE option.? Index components are much smaller than data components and require less space.