The standard search order
Without having used the TSOLIB command, TSO/E searches for a command
or program using the following sequence:
- The step library or job library
The user's LOGON procedure is checked for any //STEPLIB DD-card that specifies a user's load module library or list of libraries. If the module is found here, it will be executed.
- The link pack area
The search is continued in the libraries specified in SYS1.PARMLIB member LPALSTnn. If the module is found here, it will be executed.
- The link list concatenation
The search is continued in the libraries specified in SYS1.PARMLIB member LNKLSTnn. The module should be found here.