Post-Upgrade Steps after Upgrading Oracle Forms
After using the Upgrade Assistant to upgrade Oracle Forms, you'll need to perform a number of post-upgrade tasks.
Complete these tasks:
- Regenerate the Forms application files (fmx,mmx, andplx) using the Forms compiler. Be sure to include thecompile_all=yesoption when generating the new executable modules.
- If you previously customized the Forms context root (/forms) and/or customized the Forms app name (/frmservlet) you will need to run the Forms Configuration Helper Script in order to recreate such customizations.For more information, see Oracle Forms Configuration Helper Script in the Working With Oracle Forms guide. 
- Be sure to copy any custom files stored in the old Oracle Home into the corresponding directories of the new installation. This may include custom JAR files, custom files associated with WebUtil, and so on.
- If you had Forms Application Deployment Services in your source domain, you are required to run the fads_config.pyscript with the upgrade option:- Start the Admin Server.
- Run the fads_config.pypassing in the upgrade option.If you created or updated your Forms domain, use: $ORACLE_HOME/oracle_common/common/bin/wlst.sh $ORACLE_HOME/forms/fads/fads_config.py upgrade 
 
Note:
It may be necessary to stop the servers before copying the old files into the new directories in order for the new servers to become aware of their existence.