Try this troubleshooting steps:
1. Save your teamwork project as a local project. If it stops crashing, reshare it.
2. If it still crashing, save a backup copy and try to detect problematic elements in your model.
2.1. First, generate 3D, select all library parts, and delete them. Save this version and try to create problematic details. If you haven't any problem now, go back to the full version and try to detect problematic library part. If you suspect some library parts as unreliable, try to delete them. Especially if they are located in your detail section area. If you haven't any idea, go by half-by-half detection method. Select about half of Library Objects (it's easier to do on plans) and delete them. If ArchiCAD doesn't crash, then problematic elements were deleted. Undelete them and select half of them. Proceed with this scenario while you aren't detect problematic elements. It looks very time consuming, but half-by-half division method works well and doesn't take very long time really.
2.2. If problem doesn't related to Lib. parts, think about unusual walls intersections, other unusual elements and combinations. Test your project without this suspicious elements. If still no results, try to delete groups of objects type by type: all walls, all slabs, all roofs, etc. Save and test after each deletion. When you find out problematic type of objects, return to the first version of your project file (without deleted elements), recheck it behavior without objects of this problematic type. If all goes well, proceed with problematic library object detection scenario.
2.3. If you deleted all objects, but ArchiCAD still crashes, try to repair this file. Open new project with template settings (New and Reset). Delete all stories except one, all layers except ArchiCAD, open Attribute Manager, select all attributes and delete all which you can. After that merge your problematic project into this empty project. And test...
Good luck,
Leo
