Upgrading to Rational Team Concert 5.0.2

you can apply the fix right out of the gate.....

the manuals to "apply" the fix are in the readme in the zip you downloaded...

example of patch install instructions..

1. SERVER PATCH

Note: Before you install the server patch file CLM_server_patch_5.0.2.0-CALM502M-I20150327-1544.zip, verify that no other test fixes or hot fixes are installed. If other fixes are installed, contact IBM Software Support.

For a CLM deployment on a single server, complete the following steps once. For a distributed CLM deployment, complete the same steps on each server.

To install the server patch:

a. Stop the CLM server.
b. Verify whether the following directory exists: <server_installation_directory>/server/patch.
 -If the directory exists, back up and remove its contents.
 -If the directory does not exist, create it.
c. Copy the server patch file CLM_server_patch_5.0.2.0-CALM502M-I20150327-1544.zip into the /server/patch directory.
d. Clean the application server cache. Follow your application server's documentation on cache cleaning. Use "To clean the application cache in WebSphere" and "To clean the application cache in Tomcat" below as a reference.
e. Start the CLM server.
Note: For a distributed CLM deployment, complete the same steps on each server.

Ummmm... Baby steps man....

do 1 first...... make sure it didn't mess anything up....... THEN do the other.....

Upgrade first... Checkout what the new version looks like.....

Kick the tires.... make sure your process isn't broken. Run Reports...

After a burn in period then do the migration from  Tomcat to WAS.

Open a PMR sev 4 with IBM letting them know what you are planning...

Biggest thing I can say is before you do anything in production is  test test test... and document.