Hi we have an office with 15 Macs, 13 of which are running a mixture of OS 10.2.8 and 10.3.9. All have acrobat 6 and vectorworks 10.5.1, to create a PDF of a drawing we just select Adobe PDF as the printer and print. Works fine, we have just had 2 new machines running OS 10.4.2 and Vectorworks 11.5. If we create a new drawing then we can create a PDF the same way as above. The problem is as soon as we open a drawing created in Vectorworks 10.5.1 we can still select Acrobat PDF as the printer but the PDF options disappears and when you click on print you just get the coloured spinning wheel forever and no PDF. We get the problem on both of the new machines.