After doing an upgrade where you have made changes to either the Oracle Applications manager user or are trying to change the master name you receive the following error in the aw_install.log file located in the master's install directory.
**** Updating Automation Engine name changes - this can take a few minutes*****
***** Error setting Automation Engine, Ip, User name, Oracle id *******
Fatal Error occurred - check the log /u02/apps/appworx/install/aw_install.log
==================
Requested processes "all" not running
stopso done
Installation exited with errors
CA Automic Applications Manager