ORA-12545: Connect failed because target host or object does not exist
When trying to connect to Oracle the following error is generated:
ORA-12545: Connect failed because target host or object does
Oracle suggest that this error indicates that the address specified (in
the alias definition) is not valid.
- Oracle suggest ensuring that the
TNSNAMES.ORA file) have been entered correctly;
the most likely incorrect parameter is the node name.
- Ensure that the executable for the server exists (perhaps "oracle"
- If the protocol is TCP/IP, edit the
to change the host name to a numeric IP address and try again.
- It could be a network connectivity problem. Try pinging the host.
This error has been observed on a laptop when the database was local,
TCP/IP protocol used but the network card had been removed.
This page represents one page of many pages of notes I made whilst working
with Oracle 7 through to 10i. I now no longer work with Oracle databases,
but hope that these notes will continue to be of benefit to others.
About the author: Brian Cryer
is a dedicated software developer and webmaster. For his day job he develops websites and desktop applications as well as providing IT services. He moonlights as a technical author and consultant.