Avoid use of STEPLIB

Each z/OS® UNIX process that has a STEPLIB that is propagated from parent to child or across an exec will consume about 200 bytes of Extended Common Storage Area (ECSA). If no STEPLIB environment variable is defined, or when it is defined as STEPLIB=CURRENT, z/OS UNIX propagates all currently active TASKLIB, STEPLIB, and JOBLIB allocations during a fork(), spawn(), or exec() function.

z/OS Explorer has a default of STEPLIB=NONE coded in rse.env, as described in "rse.env, RSE configuration file" in the Host Configuration Guide (SC27-8437). For the reasons mentioned previously, you should not change this directive and you should place the targeted data sets in LINKLIST or LPA (Link Pack Area) instead.