Hello, I'm having the same problem with publish in C3d 2011. I've got a data-referenced existing surface that doesn't show up in profiles and sections when the sheet layouts are published to a pdf. I can print each sheet separately - dwg to pdf - and all looks fine. I hope the source of this problem has been found. Publishing the entire sheet set in one pdf is a great tool. I hate to do each one separatley and then compile...what a pain! I tried the suggestion to toggle 'publish in the background' and it made no difference. Hope someone out there can help. Thanks!