Function not available to this responsibility When Trying to Access Custom Form

When attempting to access custom forms, the following error occurs.

"Function not available to this responsibility. Change Responsibilities or contact your System Administrator".

Cause: Missing entry of CUSTOM_TOP under default.env file.

Solution:

Below procedure requrired to function cutom entry

1. Add  missing CUSTOM_TOP entry to $INST_TOP/ora/10.1.2/forms/server/default.env
XX_TOP=/d01/Prod/apps/apps_st/appl/xx_top/12.0.0

2. Add XX_TOP entry to CONTEXT_FILE

<XX_TOP oa_var="s_xxtop" oa_type="PROD_TOP" oa_enabled="FALSE">/d01/Prod/apps/apps_st/appl/xx_top/12.0.0</XX_TOP>

3. source APPSPROD_XXX.env

4. Restart Middle Tier services.