newNgSolve version doesn't like this, if no inner nodes

_gridFunctions/_detailsStrayField.py

@@ -52,7 +52,7 @@ class DetailsStrayField:
     cls.a2 = BilinearForm(DirichletSpace, symmetric=False)
     cls.a2 += Laplace(1.0)
 
-    cls.c2 = Preconditioner(cls.a2, "bddc")
+    cls.c2 = Preconditioner(cls.a2, "local")
 
     with TaskManager():
       cls.a2.Assemble()