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Bdeadmininvalid filename for oracle server name

Question: I'm setting up my alias to an Oracle database. When I pick Server Name I get an error of invalid filename. How come? Answer: If your protocal is set to TNS, this error will occur if HKEY_LOCAL_MACHINESOFTWAREORACLEORACLE_HOME is missing, points to an invalid directory, or the TNSNAMES.ORA file cannot be found within where ORACLE_HOME points.