How to create context files in apps R12

Database saide:-
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SQL> select name,status from v$database,v$instance;

NAME  STATUS
--------- ------------
PROD  OPEN


[oracle@apps15 11.1.0]$ lsnrctl status prod

LSNRCTL for Linux: Version 11.1.0.7.0 - Production on 14-DEC-2016 15:23:45

Copyright (c) 1991, 2008, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=apps15.com)(PORT=1536)))
STATUS of the LISTENER
------------------------
Alias                     prod
Version                   TNSLSNR for Linux: Version 11.1.0.7.0 - Production
Start Date                14-DEC-2016 14:19:52
Uptime                    0 days 1 hr. 3 min. 54 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/oracle/PROD/db/tech_st/11.1.0/network/admin/PROD_apps15/listener.ora
Listener Log File         /u01/oracle/PROD/db/tech_st/11.1.0/log/diag/tnslsnr/apps15/prod/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=apps15.com)(PORT=1536)))
Services Summary...
Service "PROD" has 1 instance(s).
  Instance "PROD", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully


[oracle@apps15 bin]$ perl adbldxml.pl appsuser=apps appspass=apps


Starting context file generation for db tier..
Using JVM from /u01/oracle/PROD/db/tech_st/11.1.0/appsutil/jre/bin/java to execute java programs..

The log file for this adbldxml session is located at:
/u01/oracle/PROD/db/tech_st/11.1.0/appsutil/log/adbldxml_12141531.log
UnsatisfiedLinkError exception loading native library: njni11

Could not Connect to the Database with the above parameters, Please answer the Questions below


Enter Hostname of Database server: apps15.com

Enter Port of Database server: 1536

Enter SID of Database server: PROD


The context file has been created at:
/u01/oracle/PROD/db/tech_st/11.1.0/appsutil/PROD_apps15.xml


                                                            ( OR )

Database context file creation:-
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[applmgr@apps15 admin]$ perl $COMMON_TOP/clone/bin/adclonectx.pl retrieve

                     Copyright (c) 2002 Oracle Corporation
                        Redwood Shores, California, USA

                        Oracle Applications Rapid Clone

                                 Version 12.0.0

                      adclonectx Version 120.23.12010000.1

Running:
/u02/Apps/apps/apps_st/comn/clone/bin/../jre/bin/java -Xmx600M -classpath /u02/Apps/apps/apps_st/comn/clone/bin/../jlib/ojdbc14.jar:/u02/Apps/apps/apps_st/comn/clone/bin/../jlib/xmlparserv2.jar:/u02/Apps/apps/apps_st/comn/clone/bin/../jlib/java oracle.apps.ad.context.RetrieveContext

Log file located at /u02/Apps/inst/apps/PROD_apps15/appl/admin/RetrieveContext_12141552.log

Database Host [apps15]:

Database Host Domain [com]:

Database Port [1521]:1536

Database SID:PROD

APPS Schema Name [APPS]:  

APPS Schema Password:apps

The following context files are available:

[1] PROD_apps15 (APPL_TOP Context)
[2] PROD_apps15 (Database Context)

Select the context to retrieve [1]:2

Destination file path [/u01/oracle/PROD/db/tech_st/11.1.0/appsutil/PROD_apps15.xml]:

Retrieved context file to /u01/oracle/PROD/db/tech_st/11.1.0/appsutil/PROD_apps15.xml

Log file location: /u02/Apps/inst/apps/PROD_apps15/appl/admin/RetrieveContext_12141552.log


Application Context file creation:-
=================================================================

[applmgr@apps15 admin]$ perl $COMMON_TOP/clone/bin/adclonectx.pl retrieve

                     Copyright (c) 2002 Oracle Corporation
                        Redwood Shores, California, USA

                        Oracle Applications Rapid Clone

                                 Version 12.0.0

                      adclonectx Version 120.23.12010000.1

Running:
/u02/Apps/apps/apps_st/comn/clone/bin/../jre/bin/java -Xmx600M -classpath /u02/Apps/apps/apps_st/comn/clone/bin/../jlib/ojdbc14.jar:/u02/Apps/apps/apps_st/comn/clone/bin/../jlib/xmlparserv2.jar:/u02/Apps/apps/apps_st/comn/clone/bin/../jlib/java oracle.apps.ad.context.RetrieveContext

Log file located at /u02/Apps/inst/apps/PROD_apps15/appl/admin/RetrieveContext_12141549.log

Database Host [apps15]:

Database Host Domain [com]:

Database Port [1521]:1536

Database SID:PROD

APPS Schema Name [APPS]:  

APPS Schema Password:apps

The following context files are available:

[1] PROD_apps15 (APPL_TOP Context)
[2] PROD_apps15 (Database Context)

Select the context to retrieve [1]:1

Destination file path [/u02/Apps/inst/apps/PROD_apps15/appl/admin/PROD_apps15.xml]:

Retrieved context file to /u02/Apps/inst/apps/PROD_apps15/appl/admin/PROD_apps15.xml

Log file location: /u02/Apps/inst/apps/PROD_apps15/appl/admin/RetrieveContext_12141549.log