Function not available to this responsibility error 

in oracle Customized Form

When access custom form we got following error message “

Function not available to this responsibility”.

The XXCUS_TOP=/u02/oracle/apps/apps_st/appl/xxcus/12.0.0
XXCONV_TOP=/u02/oracle/apps/apps_st/appl/xxconv/12.0.0
reason for this issue is that, missing entry for CUSTOM_TOP under 

default.env file.

 In R12, CUSTOM_TOP should be defined under default.env in $INST_TOP/ora/10.1.2/forms/server directory.

After cloning or Autoconfig this issue happened. In Apps R12 under $INST_TOP/ora/10.1.2/forms/server/default.env is there.

 Just add the custom top in that file.
Other wise add the same in XML files permentally.

Solution
1. Login apps user

2. cd $INST_TOP/ora/10.1.2/forms/server directory.

3. Cofirm that your CUSTOM_TOP’s are registered in the default.env file.

This means that, you should create an entry for environment variable

 CUSTOM_TOP (which contains physical path to your custom directory) 

like below in default.env file 

present under location $INST_TOP/ora/10.1.2/forms/server directory.

Like,

or

Add below entry in XML files, So that automatically this patch registerd to default.env.

/u02/oracle/apps/apps_st/appl/xxcus/12.0.0
/u02/oracle/apps/apps_st/appl/xxconv/12.0.0

4. Not required restart any services

5. Close the login page and again try