GanttProject

I can open a ganttproject file on a webdav server using the command line:
ganttproject http://name:mypass@10.159.240.146/somewhere/file.gan

but I get an error when I try to use the same URL to automatically export
the ganttproject file to HTML using:

ganttproject -html http://name:mypass@10.159.240.146/somewhere/file.gan
`pwd`/output

The error is:

[ConsoleUIFacade] ERROR: File
http://name:mypass@10.159.240.146/somewhere/file.gan
does not exist

I have also noticed in the manual you document the second path as the name
of the directory where the HTML file will be exported while it is the name
of the main HTML file (which is confusing).