Hi Eddy,
Thank you very much for the question and I am very sorry for the experience!
This is a very rare error, I have never seen it before! We have no record about similar occurrence either. Therefore, I would like to kindly ask for the file you are working on for in-house reproduction (in PLA format). Please let me know if you will need a secure place for uploading the file.
Looking forward to hearing from you soon!
Best regards,
Minh
Minh Nguyen
Technical Support Engineer
GRAPHISOFT