adautocfg.sh fails on AC-50480

Hi Everybody
Running autoconfig on APPS tiers  R12 fails on

Updating s_tnsmode to 'generateTNS'
UpdateContext exited with status: 0
AC-50480: Internal error occurred: java.lang.Exception: Error while generating listener.ora.
Error generating tnsnames.ora from the database, temporary tnsnames.ora will be generated using templates
Instantiating Tools tnsnames.ora
Tools tnsnames.ora instantiated
Web tnsnames.ora instantiated

adgentns.pl exiting with status 2
ERRORCODE = 2 ERRORCODE_END

on DB tier autoconfig ran without problem

tried with EXEC FND_CONC_CLONE.SETUP_CLEAN;
commit;
exit

and re-run autoconfig but not works.

Thanks in advance for your help