Which version of the 3D extension are you using?
Are all appropraite libraries in the correct place?
You should have "AMOSPro_3d.lib" (or "3d.lib" if you are using the original extension) and "c3d.lib" in the "APSystem" folder.
I don't know what would happen if the "c3d.lib" was missing.
Also, are all 3D files ".3DT", ".3DO" etc. where they should be?
EDIT: Forgot this... I did get AMOS to crash before when loading in files into Banks which were too small. So loading in a 100 byte file into bank 6, which was only 80 bytes long , caused the remaining 20 bytes to overwrite into the bank following it. I think I got a different error code though, but it might be worth checking just incase.
Regards,
Lonewolf10
