The exception is raised when a file is unable to transfer. Some people get confused because they dont know what is going on. It's our mistake not to append error details to the message. In fact, you can see the error details by accessing the InnerException property of the exception object. This give you an insight of the problem that you have encoutered.

In our new version of the Ultimate SFTP component, we will include many enhancements, as well as more meaningful information added to some so-generic error messages.