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couldnot open the database connection. please check the connection string.Please post the exact error code you get and how exactly you're trying to connect to the database.
Thanks for the response.
I was trying to login thorugh SQL plus from Oracle database server and then I received the error code:1521 (couldnot hand off client connection)
NO error code could be seen for the other error ( couldnot connect database stirng. .)
I received the error code:1521 (couldnot hand off client connection)I'm sorry, but if you don't give me correct information I won't be able to help you. 1521 looks like the listener port...
Here's what that error means :
$ oerr ora 1521 01521, 00000, "error in adding data files" // *Cause: During CREATE or ALTER TABLESPACE, an error was detected // while adding data files. // *Action: Check the error stack for detailed error information. $