Program objects can also be loaded in Move Mode from either a PDSE or z/OS UNIX file. This mode is used in those cases where page alignment of virtual storage can not be guaranteed. The entire program is always loaded and relocated before execution. The loader uses Move Mode when:

• A directed load has been requested (for example, the virtual storage address was passed on the LOAD SVC).
• FETCHOPT=PACK was specified at Bind time, forcing Move Mode by requesting that program objects be packed together in virtual storage rather than each be aligned on a page boundary.
• The program object is in overlay format.
• The job step is running V=R.