If automatic compression of the global library was not enabled at time of installation, you can enable it by performing the following steps:

1. Bring down Control‑O.
2. Specify Y (Yes) for parameter GLBCOMP in member CTOPARM of the IOA PARM library.
3. Submit job NEWGLOB in the IOA INSTWORK library. This job
   • renames the old global library
   • defines a new global library (using the old library name) and a sequential backup file (used by the Automatic Compression facility)
   • copies the contents of the renamed global library to the new global library

   A job can be tailored by using the ICE activity "Tailor Job" from the Housekeeping menu.

4. Restart Control‑O.