SOLUTION
Please implement the following solution in TEST instance:
1. Download and review the readme and pre-requisites for Patch 20368337:R12.PO.D
2. Ensure that you have taken a backup of your system before applying the recommended patch.
3. Apply the patch in a test environment.
4. Confirm the following file versions:
POXWPA1B.pls 120.141.12020000.39
5. Retest the issue.
6. Migrate the solution as appropriate to other environments.
Solution2: Oracle Note : 2288816.1
SOLUTION
To implement the solution, please execute the following steps:
1.Clear the cache via below navigation:
Functional Administrator responsibility-> Core Services-> Caching Framwork-> Global Configuration-> Clear All Cache.
2.Logout and re-login.
3.Retest the issue.
Solution 3 :
1. Shutdown Application and wait all concurrent processes to be kill.
2. Shutdown Database
3. Start Application and Database then run Workflow Background Process Request.
Hope this Helpful,