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Work Management Standards › Version Control › Version Installation Procedures › OS/400 Installation Procedures

OS/400 Installation Procedures

The following is the change mechanism used for IBM’s own products such as RPG III (QRPG):

  1. All changed objects are given a name based on a serial number for shipment.
  2. The numbered objects are restored on site with the OS/400 Load PTF (LODPTF) command, which checks that no fixes have been omitted. The LODPTF command also restores a log of changes, which includes information about dependencies.
  3. The restored objects are installed by a separate command—the OS/400 Apply PTF (APYPTF) command, which renames or deletes the existing version and replaces it with the serially numbered object. This allows any required data conversion to be run at the same time.
  4. Complete new releases of programs are installed by a special command—the OS/400 Load Licensed Program (LODLICPGM) command, which can run conversion programs after restoring the new objects if necessary.