Force Polygon non-closure issue with PWP

SoheilaHabashi1

Hi,

I am using GeoStudio Slope/W version 2023.1.1. There is a problem with force polygon resulting from analysis when piezometric surfaces are introduced to the model (Before addition of piezometric surfaces the polygons are healthy). The polygons appear no to be closing for submerged slices. There is no problem with them when the PWP is not considered. But, the problem arises with considering pore water pressure and introducing piezometric surfaces. It is worth mentioning that the MP and spencer method were tested and the problem exists for both. any ideas on this problem? Is that a software issue?