If you want to find out the list of oPatches that have already been installed to your EPM environment, you can take the following steps:
Open a command prompt.
Get in to the oPatch folder - ie, change directory to "D:\oracle\Middleware\EPMSystem11R1\OPatch" or wherever you have oPatch folder.
Run the following script:
opatch.bat lsinventory -oh D:\Oracle\Middleware\EPMSystem11R1 -jre D:\Oracle\Middleware\jdk160_21
Make sure to replace the path with the one you have in your environment.
You will see a list of patches that are already applied to your environment.
