The dataset hlq.ZSERVER.AUTHLIB must be APF authorized in the PARMLIB concatenation (e.g. SYS1.PARMLIB(PROGxx)).
Note: APF authorizations can be set dynamically with the following console command:
SETPROG APF,ADD,DSN=hlq.ZSERVER.AUTHLIB,SMS
or, if it is not an SMS managed dataset:
SETPROG APF,ADD,DSN=hlq.ZSERVER.AUTHLIB,VOL=volser