What is "TNS:name lookup failure"?

Hi experts,

ORA-12545 "TNS:name lookup failure"
// *Cause: A protocol specific ADDRESS parameter cannot be resolved.
// *Action: Ensure the ADDRESS parameters have been entered correctly;
// the most likely incorrect value is the node name.

What this means?

thanx
regards
Miguel Received on Tue Jan 19 1999 - 05:16:17 CST