Printing problem

I need some serious help in solving an issue that I have been facing for the last two days. The pages print upside down and on the backside of the paper from my Hp Designjet T120 printer. I never faced this issue before. Any positive response will be truly appreciated.

Hello,

Unfortunately this question is not within our expertise. Recommended to contact the HP support service.

Regards,
Ivan
iMaterialise customer support