Hi Zyben,
For anyone to give any meaningful answer it would be useful to know a few things about your problem eg. -
- What version of ArchiCAD are you using?
- Are you on a mac or PC?
- What method are you using to produce the pdf? Printing to pdf using amyuni / cutepdf driver, or 'saving as' pdf in AC11 or using publisher.
- What lines are missing? How about attaching the pdf or a screen shot?
- Are the lines actually there on screen but not on the printed version?
- Are the lines there in the View in ArchiCAD before saving to a pdf? What happens if you print straight from ArchiCAD?
- Are the objects with the 'hidden' or 'deleted' lines similar in any way? eg Same layer, on a complex profile, a particular colour / pen number etc.
- Any other info you think might be useful!