Ant scp task not working, even with jsch on ant/lib

This looks like your problem, from the top of the diagnostics:

optional tasks : not available

Your $ANT_HOME/lib directory is missing ant-jsch.jar, which is where your missing class comes from.

I'm not sure how this happened - I always install Ant from the ZIP file on the download site, which includes all the optional tasks. If you installed Ant from a Linux package, try checking to see if there is a separate package for the optional tasks.

Once you get the optional tasks installed, I would delete the old version of jsch.jar as @trashgod suggests.

I had the same problem and fixed it! Remember, you need BOTH ant-jsch.jar (native from ant or java installation) and updated jsch (in my case it was jsch-0.1.46.jar) in ant lib dir.

You need to load the newest jsch.jar from http://www.jcraft.com/jsch/ and add to libs folder (but not replace ant-jsch.jar).

The mistake a lot of developers do:

1. ant-jsch.jar out of date (in this case <scp> task is unknown for ant)
2. Adjust libraries versions, so ant-jsch.jar and jsch are compatible.
3. jsch not exists or out of date in ant lib dir
4. Native ant-jsch.jar replaced with jsch (i did it...)

In last 2 cases ant knows scp command, but says it is not available.