@dave r said:
What was different in the reference SketchUp file between the earlier version that would open and the one that showed the error? Any chance your model contains components you got from an external source such as the 3D Warehouse?
As far as I know there is no discernible difference in the two files between the earlier version and the one that won't open; I haven't inserted anything from warehouse.
I have a master model in sketchup 18 and have 10-12 layout files with reference coming from this. The external component has thrown an exception has only affected the one file of these - I have been updating model reference in all of the them as I go and the rest open and work fine.
A few lines from cad have been inserted into some layout files previously by again days before this problem occurred...