Maxsurf stability: Large Angle Stability GZ Graph Problem

Hey guys, I have been working on a 31 meters planning yacht. I have defined all of tanks and weights as well as I can and when I start to analyze large angle stability calculations, the result of the GZ graph did not satisfy me because I know that ship must be sinks somewhere between 0 - 100 degrees however for my design GZ curve almost reaches up to 130 degrees and It's shape looks a bit weird to me. Although there is not any criteria error for IMO rules I believe that the graphic is not correct. so can you explain me how can I change the shape of the GZ curve and what is the reason of this problem ? You can find the dimensions and hydrostatic calculations of the ship in the attachment.

Thanks for your time.

 

Could you show us your msd file to have a look on your boat's shapes?

 

Yes, of course It is one of the sample designs of maxsurf. I've just changed the size of the surfaces and applied a bit trimming

 

Sorry but that file is not compatible with the version I have of MaxSurf (13 pro).
The curve of GZ values that you show us is very strange. It seems as if there was no hull (buoyancy reserve) until reaching very pronounced heels. Check the appearance of the transverse stability curves.

 

Okay I will check the curves and other inputs. Also it's better to redefine the tanks and weights i guess. Thanks for your help. I will post the results when I solve the problem