KIX_TECH_DIR is a mandatory environment variable that indicates the directory where technical files used internally by ART CICS, for example to manage named DELAYs and CANCELs (thru the REQID option) or ENQ/DEQ are written. It should be the same for each server until one wants to reproduce the source limitation, where a named DELAY submitted on one CICS region, could not be canceled easily in another region.