Oracle Database Error Code ORA-12545 Description :
Connect failed because target host or object does not exist
Error Cause:
The address specified is not valid, or the program being connected to does not exist.
How to Solve :
Ensure the ADDRESS parameters have been entered correctly; the most likely incorrect parameter is the node name. Ensure that the executable for the server exists (perhaps “oracle” is missing.) If the protocol is TCP/IP, edit the TNSNAMES.ORA file to change the host name to a numeric IP address and try again.
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