CUSTOM.pll not picking from Custom_top/resource.

By default CUSTOM.pll is in AU_TOP/resource.

If customisation is there some clients will create CUSTOM_TOP and place it in CUSTOM_TOP/resource directory

solution :

Modify the below files as give in 1 and 2.

1)
login to apps as applmgr user

In R12 edit default.env ($INST_TOP/ora/10.1.2/forms/server/)
Backup the existing default.env file first before modifying it.
change form_path
From FORMS_PATH = '/../../AU_TOP/resource to
FORMS_PATH=/u002/oracle/ERP12XYZ/apps/apps_st/appl/abc_custom/au_g/1.0.0/forms/US:/u002/oracle/ERP12XYZ/apps/apps_st/appl/abc_custom/au_g/1.0.0/resource:/u002/oracle/ERP12XYZ/apps/apps_st/appl/au/12.0.0/resource:/u002/oracle/ERP12XYZ/apps/apps_st/appl/au/12.0.0/resource/stub:/u002/oracle/ERP12XYZ/apps/apps_st/appl/au/forms/US:/u002/oracle/ERP12XYZ/apps/apps_st/appl/abc_custom/abcx/1.0.0/forms/US
comment the existing FORMS_PATH and write the new FORMS_PATH as given above.

**************
# Begin Customization
# APPLFULL="${APPLFULL}abcX INFX IEXX TRNX MIGX"
# export APPLFULL
# Mention CUSTOM_TOP also as given below
CUSTOM_TOP=/u002/oracle/ERP12XYZ/apps/apps_st/appl/abc_custom
abcX_TOP=/u002/oracle/ERP12XYZ/apps/apps_st/appl/abc_custom/abcx/1.0.0
AUG_TOP=/u002/oracle/ERP12XYZ/apps/apps_st/appl/abc_custom/au_g/1.0.0

#END Customization

2)

GO to APPL_TOP backup the existing $TWO_TASK.env file starting with SID_HOSTNAME.env
comment the existing FORMS_PATH

Change FORMS_PATH what you have mentioned in default.env
export FORMS_PATH
bounce opmctl.sh
logout and login back
check echo $FORMS_PATH

Now you will be able to see the new FORMS_PATH