hi,

we are facing an issue with Double-sided printing in Planetpress, it was working fine, but it stopped working I don't know why.
the duplexing is set to Long Edge on both page1 and page 2, what else we need to check? is there anything to be done from the Planetpress configuration side?

If nothing was changed in the form, then it could be that the simplex was forced on the printer. Some printer will override the job command when they are forced to a specific plexing on the panel of the printer.

Could also be an update of the firmware of the printer, changing the syntax for duplexing (less likely than the previous scenario, but can happen).

You could also try to setup the duplexing on the form itself and not on the pages since both your pages are setup to duplexing. I have seen some printer behaving like simplex but actually going through the duplexer module for each page because each page was setup in duplex!!!