Installation can fail if product components are already running.
The installer exits without installing the product, and the following message is written to the installation log:
ERROR - A version of IBM CICS Transaction Gateway on your system is currently running.
The installer has detected that a version of CICS Transaction Gateway is already running on your system.
Stop the version of CICS Transaction Gateway that is already running and run the installer again.
Details of the running processes are written to cicstgFind.log.
For more information see Location of the installation logs.