It looks suspicious to me that you are giving the full path for the rman command, but not for the sqlplus command. Perhaps the two commands are running from different ORACLE_HOMEs and accessing different tnsnames.ora files? Privileged/Confidential Information may be contained in this message or attachments hereto. Please advise immediately if you or your employer do not consent to Internet email for messages of this kind. Opinions, conclusions and other information in this message that do not relate to the official business of this company shall be understood as neither given nor endorsed by it.