Workshop problem with frames

[Nabil]

Hello every one , i 'm a new user for the maxsurf , and i have a problem with workshop module , in fact when starting to dress my frames and go to data part to see the summary of areas and calculate weights , i find that there are frames correct and others with negative aréa calculation!
i don't know which is the cause although i have checked well in my maxsurf model that all my hull surfaces are bonded and i learned well the workshop help , i need to know how to correct this problem to continue my work , and i thank u all for help

nabil