Are you looking for a solution to the error message ‘curl (78) retr response: 550’? Then take a look at this blog.

Here at Bobcares, we have seen several such cURL related errors as part of our Server Management Services for web hosts and online service providers.

Today we’ll take a look at the causes for this error and see the fix.

More about cURL (78) retr response: 550 error

cURL error 78 occurs if the requested file is not available or the resource referenced in the URL does not exist.

When cURL tries to perform a transfer if a transient error occurs then it will retry a number of times before giving up.

Generally, 550 error means a permission denied error. It means that the user is denied to send the same command again as the server will not respond to the same code or command.

This is because the command requires some access to the file that doesn’t exist or the user doesn’t have proper access permissions.

The error message appears as shown below.

~~
CURLE_REMOTE_FILE_NOT_FOUND
The resource referenced in the URL does not exist.
~~

Or

~~
0 0 0 0 0 0 0 0 –:–:– –:–:– –:–:– 0
curl: (78) RETR response: 550
~~

Different causes and fixes for the error ‘cURL (78) retr response: 550’

Now let’s take a look at the different causes for this error to occur. Also, we shall see the fixes accordingly.

1. Incorrect cURL command syntax.

For instance, if you are trying to download a file using the cURL command as shown below,

curl -u test:test “ftp://<serverip>/home/test/README.txt” -o ~/home/dccom/testserver/db/log/README.txt

Solution:

Ensure that the cURL command that you are running is correct.

For instance, changing the path format will fix the issue.

curl -u test:test ‘ftp://xx.xxx.xx.x/%2fhome/test/README.txt’ -o /home/dccom/testserver/db/log/README.txt

2. The file having no proper permission in the FTP server.

This problem arises due to having insufficient permissions for the user.

Solution:

Ensure that the user has the required permissions to access the file or ensure that the FTP server has the right permission to access the file.

For that, grant necessary permissions for the user so that the file is accessible.

3. The file is not present in the specified folder in the FTP server.

Here the error arises if the file is not present in the folder that is specified or the file itself is deleted from the server.

Solution.

Ensure that the file is present in the right folder that is specified in the FTP server.

[Need any further assistance in fixing cURL errors? – We are here to help you.]

Conclusion

In short, this error occurs if the requested file is not available or the resource referenced in the URL does not exist. Today, we saw how our Support Engineers fix this error.