I've received the same error. In the past, I know I've run in to permissions problems, but this time, that shouldn't be the case. I'm actually saving out several IFC files (shell, interior walls/zones, plumbing, etc.) because my consultant finds it easier to reference in Revit. All files are saved to the same folder on our server. All of the files work, except the one that has plumbing fixtures and casework. I suspect that one of the casework objects (the customized Unicabinet) has some sort of minor 3D error (I get an error message in the 3D window when casework is turned on).
Use the oft-suggested binary search method to track down if this is an issue with a model element, for example, a zero-height wall. Marquee or select for saving just a few very normal elements. If that saves, then: Marquee half the project, try to save, then the other half, try to save. Then half the half, etc. until you find the part of the model that is not saving properly.
Graphisoft tends to re-use some not-too-meaningful error messages where specific messages would help the user, but hopefully the above will help...
One of the forum moderators AC 27 USA and earlier • macOS Ventura 13.6.2, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB
I've found that if I jump to the View I'm trying to export in IFC, and then refresh the 3D window prior to exporting, it typically works. I think it gives the system a chance to get the "Errors Occurred During the Last Operation" warning out of it's system, without interrupting the export.
Sometimes it still doesn't work, but if I sign out and back in, it's generally OK.
I've identified the rogue objects, but it is a part that my interior designers have used extensively (UniCabinet), and we've gone too far to remove it. It still shows up and exports fine, just with that error message. Some day when I have time, I'll dig through the GDL to try to fix the problem.