EXP-00056 ORACLE error 12154 encountered

[osman7king]

I have tried to export a database, but i got the following message:
EXP-00056 ORACLE error 12154 encountered
ORA-12154: TNS could not resolve the connect identifier specified

but i can access the database successfully and the TNS is correct.

Thanks

[rski]

Show the command you use to export database.

[osman7king]

dear rski..
I have fixed the problem.
there was a '@' charactre in the password of my database, and after I change the password and remove that character from it, the problem has been fixed and the export operation has been done successfully.

THANKS.

[Andrewpaul]

Dear osman7king,
Oracle 12154 error means TNS could not resolve the connect identifier specified. A connection to a database or other service was requested using a connect identifier, and the connect identifier specified could not be resolved into a connect descriptor using one of the naming methods

configured. You can try below instruction

There was a '@' character in the password of your database, and after you change the password and remove that character from it, the problem has been fixed and the export operation has been done successfully.
For more solution visit,