Peter, Hasansen;
Thanks for the posts-
Hasansen; don't think it's quite the same problem, hope you get it sorted though. You should probably speak to your retailer / whoever offers support, which is what I did about this one:
Peter; you are using exactly the same configuration as me, same OS, although I'm now working on AC10 build 987. The first AC 10 hotfix threw a spanner into my PDF publisher. You will have the same one. After some effort managed to get this logged as a bug (was advised that since no one had reported it as a bug they suspected it wasn't a bug, seems to me a somewhat circular argument).
Since Graphisoft support 10.3.9 they should now be working on a fix for this problem. However they can't tell me how long 'til fixed, so their advice is of course... upgrade to 10.4 (back on the treadmill....)
Thanks
Alan