Your system programmer has set the DYNAUTO installation option to control whether dynamic allocation is used automatically, or only when requested by the DYNALLOC run-time option.

DYNAUTO also controls whether dynamic allocation or JCL allocation takes precedence when JCL work data sets are specified.

If your system programmer selected DYNAUTO=IGNWKDD, dynamic allocation takes precedence over JCL allocation (JCL work data sets are actually deallocated). If you want the opposite precedence for selected applications, use the run-time option USEWKDD.

If your system programmer selected DYNAUTO=YES, JCL allocation takes precedence over dynamic allocation. If you want the opposite precedence, you must remove the JCL allocation statements.

If your system programmer selected DYNAUTO=NO, dynamic allocation of work data sets is not used unless you specify the DYNALLOC run-time option. JCL allocation takes precedence over dynamic allocation.