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Hello, I have troubles exporting my VW file in IFC for my engineer working on Revit. History of the events : 1- I exported once an IFC file and re-imported it in VW to check if it worked. It worked. 2- I exported my drawing in IFC2X2, IFC2X3 and IFC4 to be sure my engineer could read it. Tried to import them back in VW : didn't work. Error or no visible geometry in the file, even if the files were heavy, respectively 595 Mo, 1 Go, 7.7 Mo. 3- Send them anyway to the engineer, hoping it was a VW import issue. 4- Engineer couldn't read any of my files and sent to me the screenshot below. 5- Sent to engineer an additional SAT and RVT export. Error while opening the SAT file. Missing stories and walls in the RVT file. My hypothesis is that the issue comes most likely from my VW file. I'm not sure if this could be a hint but the first time I exported it, it asks me to assign layers to stories. Since my file was not organized by stories, I quickly created one and randomly picked one layer and assigned it. Surprisingly, it worked (see point 1). But then I wanted my file to be clean, so I reorganized the layers in question by stories and re-assigned them properly (?). From there, I couldn't import the exported IFC anymore (see point 2). PS : 17'727'024 errors...

Troubleshooting - I have a site model created from 3d polys and some stake points. Generally this has worked, though in one particular area the site model is coming up with some unexplained geometry... See attached image, showing input survey data for terrain (in red) and existing site model contours (green dashed). Any ideas on why this has happened / how I can fix it?!