How to Diagnose and Fix ORA-01675 Error in Oracle

If you are encountering the ORA-01675 error in Oracle, it means that the specified file must be empty or not in use. This error can occur due to various reasons such as insufficient space, incorrect file permissions, or corruption in the data file. In this blog post, we will discuss how to diagnose and fix this error to ensure smooth operation of your Oracle database.

Diagnosing the ORA-01675 Error

When diagnosing the ORA-01675 error, it is important to first identify the root cause of the issue. Here are some steps to diagnose the error:

1. Check the alert log for any specific error messages related to the ORA-01675 error.
2. Use the Oracle Enterprise Manager (OEM) or SQL*Plus to check the status of the data files and tablespaces.
3. Verify if the data file is indeed empty or not in use by any active sessions.

Fixing the ORA-01675 Error

Once you have diagnosed the ORA-01675 error, you can proceed with fixing the issue based on the specific cause. Here are some possible solutions to fix the error:

1. Ensure Sufficient Space: If the error is caused by insufficient space, you can add more space to the tablespace by adding data files or extending existing data files.

ALTER TABLESPACE tablespace_name
ADD DATAFILE 'path_to_file' SIZE 100M;

2. Check File Permissions: Verify that the Oracle user has the necessary permissions to access and modify the data files. You can use the following command to check and modify file permissions:

ls -l /path/to/datafile
chmod 644 /path/to/datafile

3. Resolve Data File Corruption: If the data file is corrupted, you can attempt to recover the file using RMAN or restore from a backup.

4. Move Tablespace to a Different File: If the data file is not in use, you can move the tablespace to a different file using the following command:

ALTER TABLESPACE tablespace_name
RENAME DATAFILE 'old_file_name' TO 'new_file_name';


In conclusion, the ORA-01675 error in Oracle can be diagnosed and fixed by identifying the root cause and applying the appropriate solution. By following the steps outlined in this blog post, you can ensure the smooth operation of your Oracle database and prevent any disruptions caused by the ORA-01675 error. For more information and detailed steps, refer to the Oracle documentation and community forums for additional support.

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