FORMS Customization - changes required in adovars.env and formservlet.ini

Customization Entry in $APPL_TOP/admin/adovars.env

# Begin customizations
export APPLLCSP=ON
export XXCSTAP_TOP="/pa01/oracle/mkkdevappl/xxcstap/11.5.0"
export XXCSTAR_TOP="/pa01/oracle/mkkdevappl/xxcstar/11.5.0"
export XXCSTGL_TOP="/pa01/oracle/mkkdevappl/xxcstgl/11.5.0"
export XXCSTPO_TOP="/pa01/oracle/mkkdevappl/xxcstpo/11.5.0"
# End customizations

Customization Entry in $IAS_ORACLE_HOME/Apache/Jserv/etc/formservlet.ini

# Begin customizations
XXCSTAP_TOP=/pa01/oracle/mkkdevappl/xxcstap/11.5.0
XXCSTAR_TOP=/pa01/oracle/mkkdevappl/xxcstar/11.5.0
XXCSTGL_TOP=/pa01/oracle/mkkdevappl/xxcstgl/11.5.0
XXCSTPO_TOP=/pa01/oracle/mkkdevappl/xxcstpo/11.5.0
# End customizations

In R12 Custom forms will not open after upgrade, because file formservlet.ini used in 11i has been replaced by default.env in R12. Put entry for the custom top in $ORA_CONFIG_HOME/10.1.2/forms/server/default.env file.
Note: If you have the custom top entries in $ORA_TOP/iAS/Apache/Jserv/etc/formservlet.ini in correct format, then autoconfig will preserve the customization.