Hello,
Thank you very much for the question and I am very sorry about the issue!
Based on the specification alone, your machine can handle models much larger than 400mb!
I believe there must be some corrupted elements inside your file that triggered some sort of CPU/memory problem. I am wondering if you are willing to share the file for a closer look? Please let me know if you need a secure place to upload the file also!
Looking forward to hearing from you!
Best regards,
Minh
Minh Nguyen
Technical Support Engineer
GRAPHISOFT