All Oracle Error CodesOracle DBA Forum

O2I-00102:

Unable to connect to Oracle
Cause: OTT could not connect to Oracle with the username, password, and, if applicable, database link that was supplied. Either the USERID option value was incorrect, or, if the USERID was not supplied, the userid OPS$<username> was not accepted.
Action: Check that the username and password are current and correct. Run another program that connects to Oracle to verify that you can connect using that username and password.