Specifies which program is acquired to use with the file when the file is
opened.
The possible values are:
- *NONE
- The file is opened without an acquired program device. All program
devices used with this file must be explicitly acquired before input/output
can be started with them.
- user defined
- Specify the name of the first program device that is acquired when the
file is opened. The program device must be added to the file before the
file is opened.
- *CMDDFT
- The system default is used.
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