I have run into a problem when calculating the hydrostatics. I have put the start draft to 7m and the end draft to 11m with no trim, but when I press the calculate button, DS only gives me the results up to 8.7m. I have checked the model for leak points, and there are none. I also did calculations for a simpler version (fewer frames) of the hull, where DS returned hydrostatics from 7 to 11m. Do any of you have any ideas what could cause this error?