getting 'SftpException : permission denied' error

We get the "**SftpException: permission denied; permission denied**" error from ComponentPro when attempting to upload a file to a SFTP server. We have full access (to read/write) on that server. It would be great if anyone could let me know what all scenarios there could be apart from access issue, those could lead to this error? Thank you.

Please share your code snippet and the path that you passed to the upload method.