RC-50014: Fatal: Execution of AutoConfig was failed in R12.2

While doing R12.2 cloning we have faced this issue.

[PROFILE PHASE]
AutoConfig could not successfully execute the following scripts:
Directory: /u01/oracle/TEST/apps/tech_st/10.1.3/perl/bin/perl -I /u01/oracle/TEST/apps/tech_st/10.1.3/perl/lib/5.8.3 -I /u01/oracle/TEST/apps/tech_st/10.1.3/perl/lib/site_perl/5.8.3 -I /u01/oracle/TEST/apps/apps_st/appl/au/12.0.0/perl -I /u01/oracle/TEST/apps/tech_st/10.1.3/Apache/Apache/mod_perl/lib/site_perl/5.8.3/i686-linux-thread-multi /u01/oracle/TEST/inst/apps/TEST_kumar/admin/scripts/adexecsql.pl sqlfile=/u01/oracle/TEST/inst/apps/TEST_kumar/admin/install
afwebprf.sql            INSTE8_PRF         1
amscmprf.sql            INSTE8_PRF         1
amswebprf.sql           INSTE8_PRF         1
bisadmprf.sql           INSTE8_PRF         1
bisdblrp.sql            INSTE8_PRF         1
clnadmprf.sql           INSTE8_PRF         1
cncmprf.sql             INSTE8_PRF         1
cseadmprf.sql           INSTE8_PRF         1
csfadmprf.sql           INSTE8_PRF         1
csiadmprf.sql           INSTE8_PRF         1
eamadmprf.sql           INSTE8_PRF         1
fteadmprf.sql           INSTE8_PRF         1
icxwebprf.sql           INSTE8_PRF         1
oksfrmprf.sql           INSTE8_PRF         1
wshadmprf.sql           INSTE8_PRF         1

[APPLY PHASE]
AutoConfig could not successfully execute the following scripts:
Directory: /u01/oracle/TEST/apps/tech_st/10.1.3/perl/bin/perl -I /u01/oracle/TEST/apps/tech_st/10.1.3/perl/lib/5.8.3 -I /u01/oracle/TEST/apps/tech_st/10.1.3/perl/lib/site_perl/5.8.3 -I /u01/oracle/TEST/apps/apps_st/appl/au/12.0.0/perl -I /u01/oracle/TEST/apps/tech_st/10.1.3/Apache/Apache/mod_perl/lib/site_perl/5.8.3/i686-linux-thread-multi /u01/oracle/TEST/inst/apps/TEST_kumar/admin/install
adadmat.pl              INSTE8_APPLY       1

[APPLY PHASE]
AutoConfig could not successfully execute the following scripts:
Directory: /u01/oracle/TEST/apps/tech_st/10.1.3/perl/bin/perl -I /u01/oracle/TEST/apps/tech_st/10.1.3/perl/lib/5.8.3 -I /u01/oracle/TEST/apps/tech_st/10.1.3/perl/lib/site_perl/5.8.3 -I /u01/oracle/TEST/apps/apps_st/appl/au/12.0.0/perl -I /u01/oracle/TEST/apps/tech_st/10.1.3/Apache/Apache/mod_perl/lib/site_perl/5.8.3/i686-linux-thread-multi /u01/oracle/TEST/inst/apps/TEST_kumar/admin/install
adadmat.pl              INSTE8_APPLY       1

AutoConfig is exiting with status 16

RC-50014: Fatal: Execution of AutoConfig was failed
Raised by oracle.apps.ad.clone.ApplyApplTop
ERROR: AutoConfig completed with errors. Check logfile at /u01/oracle/TEST/inst/apps/TEST_kumar/admin/log/ApplyAppsTier_10071110.log for details.
ApplyApplTop Completed Successfully.

# Checking the status of AutoConfig run of ApplyApplTop
Warning : AutoConfig has completed with  errors .
Please review the AutoConfig section in the logfile. If required, you can re-run AutoConfig from command line  after fixing the problem

Cause:

NLS_LANG parameter was already set on server.

To check $env|grep NLS

Solution:

unset NLS_LANG and then run adcfgclone.pl