Details was done with v5 before to open it on a fresh recompiled develop branch.
Looks something is wrong with seam allowance on the second piece at Jp.
pantalon.val (14,2 Ko) fabrice.vit (2,4 Ko)
Yep. Your pattern is wrong. Just reverse the curve Spl_Jp_J and all will be okay. In this version for reversing call context menu on the curve name and select Reverse.
Thanks. I managed to do it.