Unable to create PDF for print production

[Dahzee]

I don't know if anyone has any ideas how I can get round this problem.

I am trying to export some artwork as a PDF so I can get it printed, but every time I try to export it I get the attached message.

I have tried various times always after a reboot but with no luck.

The file is only just under 7mb in size so I can't figure out why it is doing it.

It is important that I export with layers as I have a cutter guide included so the printer can see where he needs to position the print on the sheet and it is printed on both sides.

Any suggestions gratefully accepted.

I am using XDP6

Many Thanks

Dahzee