Oracle plsql developer Connection prompt: The Host object name cannot be found... Solution

When Oracle uses plsql developer to connect, the following error occurs: The Host object name cannot be found. The solution is mostly because the computer name is modified. Www.2cto.com solution: Step 1: sqlnet under the directory C:/oracle/product/10.1.0/db_1/NETWORK/ADMIN. ora tnsnames. ora listener. the original computer name in these three files is changed to your current computer name. Now the SQL Plus connection should be okay. Step 2: A folder in the C:/oracle/product/10.1.0/db_1 Directory: Change your original computer name _ orcl to the current computer name _ orcl