Return
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Title
Error connecting to database:"ORA-12545:Connect failed because target host or object does not exist" -
Description
The following error occurs when connecting to a remote database: "ORA-12545: Connect failed because target host or object does not exist". -
Cause
Firewall 'Blocked' setting for Toad.exe. -
Resolution
RESOLUTION #1:
Change existing firewall or antivirus setting to allow Toad.exe as an application to connect to database.RESOLUTION #2:
If using direct connect, make sure that the correct information is entered. You may need to use the IP address for the server name.RESOLUTION #3:If your company is using LDAP, ensure you also copy over the LDAP and SQLNET.ora files to you Oracle Client Home (Network\Admin folder) location.RESOLUTION #4:If you use Oracle Full Client check if the client is installed correctly. Try to start SQLPlus. You must be able to connect to the database using SQLPlus.RESOLUTION #5:If you use VPN to connect to your Oracle DB, please ensure your VPN is connected.