In December 2021 the following announcement was released for TPX 5.4:
General Availability Announcement for TPX 5.4 S2111 Service Update
Do existing customers need to take any action?
Release : 5.4
Component : TPX for z/OS
The TPX 5.4 S2111 Service Update is intended for new TPX customers.
This Service Update includes TPX base, and all maintenance and new feature PTFs through CA Recommended Service (CA RS) 2111, totaling about 120 PTFs.
The Service Update pax file simplifies the installation process, making it easy to receive and apply all maintenance and new feature PTFs through CA RS 2111.
By installing this Service Update, you ensure that your systems are current on maintenance for TPX 5.4.
New Installations: If you are performing a new TPX Release 5.4 installation, install the Service Update pax file, TPX 5.4 S2111, and any additional
maintenance that was published after CA RS 2111.
Existing Installations: Existing customers are not required to install the Service Update pax file. To run the Service Update-equivalent product,
verify that you are current with all product maintenance.
The full announcement can be found here.