To uninstall P6 Integration API from a WebLogic server:
Do one of the following:
On Windows platforms, from the Start menu, choose Programs, app name, Uninstall app name.
On Unix platforms, run the uninstall.sh script in the weblogic_home/user_projects/domain directory.
If you will use the same apihome directory for the new deployment, delete the existing WAR file from that directory to avoid conflict with the new PrimaveraAPI.war file.