[scribus] Scripting kprinter duplex

[Rolf-Werner Eilert]

Writing a script calling kprinter to print duplex (portrait, long-edge), 
what would be the option? I cannot find any hint on this.

For lp the thing would be -o sides=two-sided-long-edge

but for kprinter, it doesn't seem to work.

I have to admit that for saving paper, I called the kprinter dialog 
hoping it shows duplex on when it comes up.

Any ideas?

Regards
Rolf