change mesh compataibility in hopper.py

testcases/hopper-3d/hopper.py

@@ -110,7 +110,7 @@ p2.remove_particles_flag((p2.position()[:,0] + p2.r()[:,0] <0.18))
 p2.remove_particles_flag((p2.position()[:,0] + p2.r()[:,0] >-0.18))
 p2.position()[:,1] -= 0.5
 p.clear_boundaries()
-p.load_msh_boundaries("mesh" + ".msh", ["Inner","Right","Left","RightUp","RightDown","LeftUp","LeftDown","Front","Rear","LockDown"], material = "Steel")
+p.load_msh_boundaries("mesh" + ".msh", ["Inner","Right","Left","Front","Rear","LockDown"], material = "Steel")
 
 p.write_vtk(outputdir, 0, 0)
 # 
@@ -123,7 +123,7 @@ while t < tEnd :
     if t>=10 and opened == 0:
         opened = 1
         p.clear_boundaries()
-        p.load_msh_boundaries("mesh" + ".msh", ["Inner","Right","Left","RightUp","RightDown","LeftUp","LeftDown","Front","Rear"],material="Steel")
+        p.load_msh_boundaries("mesh" + ".msh", ["Inner","Right","Left","Front","Rear"],material="Steel")
 #Adding new particles
     if (max(p.position()[:,1])+max(p.r()) <0.6) and t > 10 and t < 25:
       p.add_particles(p2.position(),p2.r(),p2.mass(),v=p2.velocity(),tag="Sand",forced=p2.forced_flag(),contact_forces=p2.contact_forces())