FTP 200 Command OK vs 550 File Unavailable
FTP 200 (Command OK) is a 2xx Positive Completion response, while 550 (File Unavailable) is a 5xx Permanent Negative response. 200 indicates that the command has been successfully executed. This is a general acknowledgment that the command was understood and carried out. In contrast, 550 means that requested action not taken. File unavailable — the file does not exist, the path is wrong, or you do not have permission to access it.
Description
The command has been successfully executed. This is a general acknowledgment that the command was understood and carried out.
When You See It
After issuing any command that completes successfully, such as TYPE, MODE, or NOOP.
How to Fix
No fix needed — the command succeeded. This is the standard positive response for commands that don't return data.
Description
Requested action not taken. File unavailable — the file does not exist, the path is wrong, or you do not have permission to access it.
When You See It
When you try to download, delete, or navigate to a file or directory that does not exist or is restricted by server permissions.
How to Fix
Verify the file path and name are correct (FTP paths are case-sensitive on most servers). Check your user permissions with the server administrator.
Key Differences
200 is a 2xx Positive Completion response, while 550 is a 5xx Permanent Negative response.
FTP 200: The command has been successfully executed. This is a general acknowledgment that the command was understood and carried out.
FTP 550: Requested action not taken. File unavailable — the file does not exist, the path is wrong, or you do not have permission to access it.
You encounter 200 when after issuing any command that completes successfully, such as TYPE, MODE, or NOOP.
You encounter 550 when when you try to download, delete, or navigate to a file or directory that does not exist or is restricted by server permissions.
When to Use Which
For 200 (Command OK): No fix needed — the command succeeded. This is the standard positive response for commands that don't return data. For 550 (File Unavailable): Verify the file path and name are correct (FTP paths are case-sensitive on most servers). Check your user permissions with the server administrator.