Can not export layout to PDF/X-4

[PhilBJ]

I am trying to export my layout do PDF/X-4. I set up the export options as follwing:

But no matter what I do i get a PDF 1.6 file.

It's driving me nuts.. What's going on?

 

[joe_l]

14 minutes ago, PhilBJ said:

It's driving me nuts.. What's going on?

ISO 15930-7:2008: PDF/X-4, Colour-managed, CMYK, gray, RGB or spot color data are supported, as are PDF transparency and optional content. A second conformance level named PDF/X-4p may be used when the ICC Profile in the output intent is externally supplied. It is using PDF 1.6. A second edition with minor corrections and improvements (which does not change file identifications) is ISO 15930-7:2010