PDF Print DesignStudio 1.6

Hi!

I migrated a application from DS 1.5 to DS1.6

Now the pdf Export doesn't work anymore.

All I get is the pop-up with the PDF property settings. When selecting "ok" nothing happens (I am using IE 11).

Afterwards nothing hapens- the pdf file is not created.

Any ideas whs this doens't work anymore?

Thank you in advance

Christoph