Simon,
This problem could be specific to your file.
I would probably contact the GS guys in New Zealand, even send them the file so they can figure something out about it.
I mean, a crash is a bad thing so it is always good to find out what causes it. Then it can be fixed if it is an ArchiCAD error that causes it.
Loving Archicad since 1995 - Find Archicad Tips at x.com/laszlonagy
AMD Ryzen9 5900X CPU, 64 GB RAM 3600 MHz, Nvidia GTX 1060 6GB, 500 GB NVMe SSD
2x28" (2560x1440), Windows 10 PRO ENG, Ac20-Ac28