INVALID DATA SET NAME, =
******
Release : All supported versions
Problem is an equal sign "=" instead of a continuation dash in the LSTEP data set concatenation:
ALLOC F(LSTEP) DS( -
'OEM.ENDV.PROD.R18M1.CSIQAUTU' =
'OEM.ENDV.PROD.R18M1.CSIQAUTH' -
) SHR REUSE
Change the = to a -