Index: /issm/trunk-jpl/src/c/classes/Elements/Tria.cpp
===================================================================
--- /issm/trunk-jpl/src/c/classes/Elements/Tria.cpp	(revision 25213)
+++ /issm/trunk-jpl/src/c/classes/Elements/Tria.cpp	(revision 25214)
@@ -1720,5 +1720,5 @@
 				xyz_bis[2][2]=xyz_list[3*1+2]+s2*(xyz_list[3*2+2]-xyz_list[3*1+2]);
 			}
-			else _error_("case not possible");
+			else _error_("Tria::GetGroundedPortion: levelset case not allowed for element #" << this->Sid()+1 << ":" << gl[0] << "|" << gl[1] << "|" << gl[2]);
 
 			/*Compute fraction of grounded element*/