VERIFIED SOLUTION i

Resolve possible issues on IBMi with locked libraries causing a problem installing new software or installing new software versions.

Operating System: IBMi (AS400, OS400 iSeries)

Products affected: 
EZ-CASE Plus
Generalized Selection Plus
List Conversion Plus
Merge/Purge Plus

Issue

Libraries affected by an installation must not be locked.

Several of the Pitney Bowes Software 'List Product' and other applications on IBMi are installed per the IBMi Installation Instructions attached.

There are two installation chapters.  Chapter 1 contains the instructions for installing:
EZ-CASE Plus
Generalized Selection Plus
List Conversion Plus
Merge/Purge Plus
(and some other applications.  Although many of the other ones listed in this old document *now* no longer use these instructions.  Many now have separate install instructions for the individual product..)

Chapter 2 contains general install instructions for other products.  (Which are even older legacy products that have not been rebuilt so-as to be able to be installed using the newer chapter 1 installation process.)

Cause

The libraries that are involved with an installation must not be locked, because during the installation process these libraries need to be renamed, and files moved around, etc.  Generally these are the G1@@PGMS and G1xxPGMS (where xx is the 2-byte product code for an application) libraries.  

Resolution

UPDATED: May 24, 2019
If using the Chapter 1 install script, it checks for locks on the libraries involved, and will pause the installation if any are detected.  In that case you can use the command-
WRKOBJLCK OBJ(LibraryName) OBJTYPE(*LIB)
to find out who or what has the library(s) locked, and take action to unlock it before continuing the installation.