diff --git a/configure.ac b/configure.ac
index d3501c6e..911cfe9f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -87,11 +87,12 @@ AC_ARG_ENABLE([nglib],
 
 AC_ARG_ENABLE([parallel],
         [AC_HELP_STRING([--enable-parallel],[enable mpi parallelization])],
-        [AC_SUBST([MPI_INCLUDES], "-I/usr/lib64/mpi/gcc/openmpi/include -DPARALLEL -I/usr/include/metis -DMETIS -DVTRACE -I/usr/local/include/vampirtrace")
-        AC_SUBST([MPI_LIBS], "-L/usr/lib64/mpi/gcc/openmpi/lib64 -lmpi_cxx -lmetis -lvt-hyb")
+        [AC_SUBST([MPI_INCLUDES], "-I/usr/lib64/mpi/gcc/openmpi/include -DPARALLEL -I/usr/include/metis -DMETIS -I/usr/local/include/vampirtrace")
+        AC_SUBST([MPI_LIBS], "-L/usr/lib64/mpi/gcc/openmpi/lib64 -lmpi_cxx -lmetis")
         ]
         )       
-
+#          -DVTRACE
+#          -lvt-hyb
 
 #        [AC_SUBST([MPI_INCLUDES], "-I/opt/mpich/include -I/usr/include/mpich2 -I/usr/include/metis -DPARALLEL  -I/usr/share/metis/Lib -DMETIS -DVTRACE -I/usr/local/include/vampirtrace")
 #        AC_SUBST([MPI_LIBS], "-lmetis -L/opt/mpich/ch-p4/lib -lmpich")
diff --git a/ng/occgeom.tcl b/ng/occgeom.tcl
index efab5c33..0a8e91e7 100644
--- a/ng/occgeom.tcl
+++ b/ng/occgeom.tcl
@@ -1,6 +1,6 @@
 if { [catch { load liboccvis[info sharedlibextension] Ng_OCC } result ] } {
-    puts "cannot load occ" 
-    puts "error: $result"
+    # puts "cannot load occ" 
+    # puts "error: $result"
 
     # dummy 
     proc rebuildoccdialog { } { }
diff --git a/tutorials/cubeandring.geo b/tutorials/cubeandring.geo
index 25629fdf..11f4f544 100644
--- a/tutorials/cubeandring.geo
+++ b/tutorials/cubeandring.geo
@@ -3,7 +3,8 @@ algebraic3d
 curve2d testcurve=(8;
 	-0.5,1;
 	-0.55,1.5;
-	-0.275,1.775;
+#	-0.275,1.775;
+	-0.5,2;
 	0,2.05;
 	0.5,2;
 	0.55,1.5;