Index: /issm/trunk/src/c/objects/Tria.cpp
===================================================================
--- /issm/trunk/src/c/objects/Tria.cpp	(revision 232)
+++ /issm/trunk/src/c/objects/Tria.cpp	(revision 233)
@@ -1920,5 +1920,5 @@
 		/*Build gradje_g_gaussian vector: */
 		for (i=0;i<numgrids;i++){
-			grade_g_gaussian[i]=viscosity2*thickness*( (2*dvx[0]+dvy[1])*2*dadjx[0]+(dvx[1]+dvy[0])*(dadjx[1]+dadjy[0])+(2*dvy[1]+dvx[0])*2*dadjy[1])*Jdet*gauss_weight*l1l2l3[i]; 
+			grade_g_gaussian[i]=-viscosity2*thickness*( (2*dvx[0]+dvy[1])*2*dadjx[0]+(dvx[1]+dvy[0])*(dadjx[1]+dadjy[0])+(2*dvy[1]+dvx[0])*2*dadjy[1])*Jdet*gauss_weight*l1l2l3[i]; 
 		}