Permission denied while ploading a file

Version: 2016.1.0.0

Issue: We have a scenario where we download the file from clients SFTP server and put it in s3 and append something to that and overwrite the existing file in SFTP. While uploading the file we are seeing this issue of permission denied.

I tried uploading the file manually through filezilla and it works without issues.

Error Details:

Message: Permission Denied.

Stack Trace:

at Renci.SshNet.Sftp.SftpSession.RequestOpen(String path, Flags flags, Boolean nullOnError)\n at Renci.SshNet.SftpClient.InternalUploadFile(Stream input, String path, Flags flags, SftpUploadAsyncResult asyncResult, Action`1 uploadCallback)\n at

I would like know

Why this is happening?
Will there be a scenario where the SFTP transfer works with filzilla but not using SSH.NET?
How to capture the messages from SSH.NET programatically?

Comience reproduciendo la carga de SftpClient descrita en el issue e inspeccione las entradas de la pila de RequestOpen e InternalUploadFile. Compare la transferencia con SSH.NET con la transferencia exitosa de FileZilla y determine cómo capturar mensajes de SSH.NET mediante programación; se considera completado cuando se haya identificado la causa de la diferencia de permisos y se haya documentado la salida de diagnóstico relevante.