edtFTPj/PRO has a rich API and provides complex capabilities. There are a wide
variety of FTP, FTPS and SFTP servers in existence, which may or may not implement
the relevant standards.
If difficulties are experienced in connecting to a server or performing
operations, a number of steps can be taken to try to resolve the problem:
that you can connect using a standalone FTP application such as FileZilla. If you cannot
connect with FileZilla, it is likely that other clients (such as this
one) will also experience difficulties connecting. Make sure you select the correct protocol.
For SFTP, alternatively (or also) use a command-line ssh client to connect
to the server using the authentication method of your choice, and ensure that this
works. ssh -vvv can be used to provide helpful debugging information.
If you can connect using FileZilla, try using the appropriate How To
example (with suitable settings) provided with the distribution.
Generate a log file exhibiting the error with the level set to ALL.
This may provide you (and us) with a clue to the problem.
If possible, obtain the server log file to see if it contains any clues to
the question & answer board
to see if the issue has been reported and a resolution posted.
The board is searchable and contains advice and answers many common questions that developers have faced when using this library.
Consult the product's revision
history to see if your problem has been resolved in a later version of the software. If your support agreement is current,
download the latest version.
If you are unable to resolve the problem and you have a current support
agreement, you may need to contact support.