general ifc export troubles in Architecture Posted June 24, 2013 As you have started the file from scratch, my guess is that line styles will not be an issue. ACAD line types are easy to see as they are normally have names in UPPERCASE. I am looking into this as I have had a couple of similar issues with IFC coming from our steel fabricators using Tekla Structures; although not nearly as drastic as yours. There doesn't seem to be much information on this, although I have been looking in VSS (VW Service Select) Webinars > Tips by Guest Presenters and Vectorworks Power Users. There may be some stuff there, but I haven't gone through the BIM based ones as yet. I'm not much help I'm afraid. Back to my previous post, I would try exporting individual objects to see if they work on their own. Also you could try attaching IFC classes to the objects, but now I am really just guessing!