diff --git a/libsrc/meshing/findip.hpp b/libsrc/meshing/findip.hpp
index dc3c6744..71de05f9 100644
--- a/libsrc/meshing/findip.hpp
+++ b/libsrc/meshing/findip.hpp
@@ -118,10 +118,10 @@ inline int FindInnerPoint (POINTArray & points,
     {
       // const Element2d & el = faces[i];
       // (*testout) << "el[" << i << "] = " << el << endl;
-      for (int j = 1; j <= 3; j++)
+      for (int j : Range(3))
 	{
-	  double hi = Dist (points[faces[i].PNumMod(j)],
-			    points[faces[i].PNumMod(j+1)]);
+	  double hi = Dist (points[faces[i][j%3]],
+			    points[faces[i][(j+1)%3]]);
 	  if (hi > hmax) hmax = hi;
 	}
     }
diff --git a/libsrc/meshing/improve3.cpp b/libsrc/meshing/improve3.cpp
index a07088dc..bda1cfdb 100644
--- a/libsrc/meshing/improve3.cpp
+++ b/libsrc/meshing/improve3.cpp
@@ -556,10 +556,27 @@ double MeshOptimize3d :: SplitImproveEdge (Mesh & mesh, OPTIMIZEGOAL goal, Table
           if(mp.only3D_domain_nr != mesh[ei].GetIndex())
               return 0.0;
 
+  if (goal == OPT_LEGAL)
+    {
+      bool all_tets_legal = true;
+      for(auto ei : hasbothpoints)
+          if( !mesh.LegalTet (mesh[ei]) || elerrs[ei] > 1e3)
+              all_tets_legal = false;
+      if(all_tets_legal)
+          return 0.0;
+    }
 
   double bad1 = 0.0;
+  double bad1_max = 0.0;
   for (ElementIndex ei : hasbothpoints)
-      bad1 += CalcBad (mesh.Points(), mesh[ei], 0);
+    {
+      double bad = elerrs[ei];
+      bad1 += bad;
+      bad1_max = max(bad1_max, bad);
+    }
+
+  if(bad1_max < 100.0)
+      return 0.0;
 
   bool puretet = 1;
   for (ElementIndex ei : hasbothpoints)
@@ -598,15 +615,26 @@ double MeshOptimize3d :: SplitImproveEdge (Mesh & mesh, OPTIMIZEGOAL goal, Table
   px(1) = pnew.Y();
   px(2) = pnew.Z();
 
-  if (bad1 > 0.1 * badmax)
-      BFGS (px, pf, par);
+  if (bad1_max > 0.1 * badmax)
+    {
+      int pok = pf.Func (px) < 1e10;
+      if (!pok)
+          pok = FindInnerPoint (mesh.Points(), locfaces, pnew);
+
+      if(pok)
+        {
+          px(0) = pnew.X();
+          px(1) = pnew.Y();
+          px(2) = pnew.Z();
+          BFGS (px, pf, par);
+          pnew.X() = px(0);
+          pnew.Y() = px(1);
+          pnew.Z() = px(2);
+        }
+    }
 
   double bad2 = pf.Func (px);
 
-  pnew.X() = px(0);
-  pnew.Y() = px(1);
-  pnew.Z() = px(2);
-
   mesh[ptmp] = Point<3>(pnew);
 
   for (int k = 0; k < hasbothpoints.Size(); k++)
@@ -688,6 +716,7 @@ void MeshOptimize3d :: SplitImprove (Mesh & mesh,
 
   PrintMessage (3, "SplitImprove");
   (*testout)  << "start SplitImprove" << "\n";
+  mesh.BoundaryEdge (1,2); // ensure the boundary-elements table is built
 
   ParallelFor( mesh.VolumeElements().Range(), [&] (ElementIndex ei) NETGEN_LAMBDA_INLINE
     {
@@ -749,7 +778,7 @@ void MeshOptimize3d :: SplitImprove (Mesh & mesh,
   }
   topt.Stop();
   mesh.Compress();
-  PrintMessage (5, cnt, " splits performed");
+  PrintMessage (1, cnt, " splits performed");
   (*testout) << "Splitt - Improve done" << "\n";
 
   if (goal == OPT_QUALITY)
diff --git a/libsrc/meshing/meshing.hpp b/libsrc/meshing/meshing.hpp
index 8ed81256..35cb9add 100644
--- a/libsrc/meshing/meshing.hpp
+++ b/libsrc/meshing/meshing.hpp
@@ -42,13 +42,12 @@ namespace netgen
 
 #define _INCLUDE_MORE
 
+#include "findip.hpp"
+#include "findip2.hpp"
 
 #include "meshing3.hpp"
 #include "improve3.hpp"
 
-#include "findip.hpp"
-#include "findip2.hpp"
-
 #include "curvedelems.hpp"
 #include "clusters.hpp"
 
diff --git a/tests/pytest/results.json b/tests/pytest/results.json
index 50a2f19b..ec0753f3 100644
--- a/tests/pytest/results.json
+++ b/tests/pytest/results.json
@@ -109,33 +109,33 @@
         },
         {
             "angles_tet": [
-                19.341,
-                141.96
+                14.829,
+                145.34
             ],
             "angles_trig": [
-                16.682,
-                126.99
+                16.491,
+                127.01
             ],
             "ne1d": 94,
             "ne2d": 114,
-            "ne3d": 157,
-            "quality_histogram": "[0, 0, 0, 0, 0, 1, 1, 7, 11, 12, 9, 4, 12, 5, 20, 23, 15, 25, 11, 1]",
-            "total_badness": 244.61102429
+            "ne3d": 121,
+            "quality_histogram": "[0, 0, 0, 0, 1, 2, 4, 9, 17, 14, 11, 12, 10, 7, 11, 4, 2, 14, 3, 0]",
+            "total_badness": 227.92261008
         },
         {
             "angles_tet": [
                 16.335,
-                155.63
+                152.61
             ],
             "angles_trig": [
-                14.668,
-                147.85
+                20.0,
+                140.0
             ],
             "ne1d": 136,
             "ne2d": 222,
-            "ne3d": 381,
-            "quality_histogram": "[0, 0, 0, 0, 1, 4, 2, 4, 6, 5, 14, 34, 38, 48, 65, 73, 50, 16, 17, 4]",
-            "total_badness": 563.54810644
+            "ne3d": 348,
+            "quality_histogram": "[0, 0, 0, 0, 0, 4, 3, 5, 4, 9, 18, 23, 27, 46, 55, 62, 55, 20, 16, 1]",
+            "total_badness": 514.05343802
         },
         {
             "angles_tet": [
@@ -154,33 +154,33 @@
         },
         {
             "angles_tet": [
-                26.476,
-                140.11
+                26.449,
+                140.15
             ],
             "angles_trig": [
-                26.654,
-                117.5
+                24.477,
+                114.57
             ],
             "ne1d": 284,
             "ne2d": 938,
-            "ne3d": 3844,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 14, 51, 129, 292, 530, 650, 787, 717, 501, 171]",
-            "total_badness": 4815.6094781
+            "ne3d": 3808,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 0, 6, 12, 47, 117, 277, 497, 641, 782, 746, 506, 177]",
+            "total_badness": 4753.2608558
         },
         {
             "angles_tet": [
-                28.77,
+                28.839,
                 136.82
             ],
             "angles_trig": [
                 24.852,
-                123.15
+                123.06
             ],
             "ne1d": 456,
             "ne2d": 2496,
-            "ne3d": 18753,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 32, 96, 275, 747, 1627, 2885, 4041, 4511, 3355, 1181]",
-            "total_badness": 22636.690026
+            "ne3d": 18745,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 27, 92, 267, 746, 1634, 2890, 4017, 4509, 3387, 1173]",
+            "total_badness": 22615.490176
         }
     ],
     "circle_on_cube.geo": [
@@ -270,71 +270,71 @@
             ],
             "ne1d": 224,
             "ne2d": 944,
-            "ne3d": 11879,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 15, 66, 190, 486, 1113, 1773, 2543, 2772, 2231, 685]",
-            "total_badness": 14361.247665
+            "ne3d": 11884,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 15, 67, 187, 504, 1104, 1766, 2553, 2772, 2223, 688]",
+            "total_badness": 14368.116024
         }
     ],
     "cone.geo": [
         {
             "angles_tet": [
-                12.9,
-                152.18
+                12.946,
+                151.76
             ],
             "angles_trig": [
-                18.843,
-                127.95
+                17.672,
+                123.45
             ],
             "ne1d": 64,
             "ne2d": 722,
-            "ne3d": 1287,
-            "quality_histogram": "[0, 0, 0, 0, 0, 2, 8, 15, 35, 61, 97, 133, 123, 161, 175, 151, 136, 112, 60, 18]",
-            "total_badness": 1946.0484538
+            "ne3d": 1259,
+            "quality_histogram": "[0, 0, 0, 0, 0, 1, 8, 17, 41, 54, 101, 121, 139, 140, 171, 144, 127, 124, 55, 16]",
+            "total_badness": 1909.2743283
         },
         {
             "angles_tet": [
-                13.641,
-                161.17
+                12.942,
+                162.28
             ],
             "angles_trig": [
-                12.726,
-                140.38
+                10.449,
+                154.86
             ],
             "ne1d": 32,
             "ne2d": 220,
-            "ne3d": 847,
-            "quality_histogram": "[0, 0, 0, 0, 1, 14, 31, 45, 73, 89, 90, 85, 83, 69, 67, 60, 57, 51, 25, 7]",
-            "total_badness": 1516.2572857
+            "ne3d": 651,
+            "quality_histogram": "[0, 0, 0, 7, 5, 23, 31, 53, 53, 64, 49, 37, 45, 59, 49, 52, 48, 45, 23, 8]",
+            "total_badness": 1234.956476
         },
         {
             "angles_tet": [
-                3.6386,
-                171.81
+                2.7343,
+                173.79
             ],
             "angles_trig": [
-                6.6632,
-                161.63
+                8.7414,
+                158.73
             ],
             "ne1d": 48,
             "ne2d": 428,
-            "ne3d": 1000,
-            "quality_histogram": "[0, 15, 60, 63, 62, 69, 60, 59, 84, 82, 83, 86, 67, 51, 63, 28, 23, 25, 19, 1]",
-            "total_badness": 2965.2093875
+            "ne3d": 868,
+            "quality_histogram": "[0, 7, 36, 34, 44, 67, 67, 67, 87, 94, 61, 81, 55, 45, 46, 23, 20, 18, 15, 1]",
+            "total_badness": 2363.7016426
         },
         {
             "angles_tet": [
-                17.354,
-                145.27
+                15.888,
+                150.08
             ],
             "angles_trig": [
-                17.781,
-                119.21
+                17.326,
+                121.07
             ],
             "ne1d": 64,
             "ne2d": 722,
-            "ne3d": 1266,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 1, 9, 21, 45, 72, 122, 136, 159, 177, 181, 146, 112, 69, 16]",
-            "total_badness": 1845.674381
+            "ne3d": 1237,
+            "quality_histogram": "[0, 0, 0, 0, 0, 1, 5, 6, 28, 49, 94, 114, 121, 154, 165, 157, 128, 136, 64, 15]",
+            "total_badness": 1827.4800276
         },
         {
             "angles_tet": [
@@ -353,18 +353,18 @@
         },
         {
             "angles_tet": [
-                22.876,
-                139.95
+                22.764,
+                140.56
             ],
             "angles_trig": [
-                25.605,
+                27.263,
                 120.46
             ],
             "ne1d": 160,
             "ne2d": 4748,
-            "ne3d": 27248,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 1, 3, 17, 69, 239, 641, 1323, 2759, 4411, 5626, 6124, 4496, 1539]",
-            "total_badness": 33323.749036
+            "ne3d": 27254,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 1, 4, 16, 71, 235, 659, 1375, 2774, 4392, 5618, 6099, 4470, 1540]",
+            "total_badness": 33350.665582
         }
     ],
     "cube.geo": [
@@ -462,18 +462,18 @@
     "cubeandring.geo": [
         {
             "angles_tet": [
-                5.2065,
-                170.27
+                4.093,
+                171.18
             ],
             "angles_trig": [
-                12.789,
+                12.541,
                 150.46
             ],
             "ne1d": 262,
             "ne2d": 726,
-            "ne3d": 2190,
-            "quality_histogram": "[0, 3, 5, 28, 68, 111, 125, 104, 84, 57, 59, 89, 112, 203, 259, 256, 258, 226, 113, 30]",
-            "total_badness": 4074.9593098
+            "ne3d": 2187,
+            "quality_histogram": "[0, 4, 11, 35, 76, 102, 132, 102, 83, 52, 60, 80, 114, 196, 255, 258, 257, 227, 114, 29]",
+            "total_badness": 4157.6373393
         },
         {
             "angles_tet": [
@@ -488,12 +488,12 @@
             "ne2d": 164,
             "ne3d": 252,
             "quality_histogram": "[0, 0, 0, 0, 0, 0, 1, 4, 2, 3, 11, 30, 31, 34, 40, 38, 33, 17, 7, 1]",
-            "total_badness": 369.95185592
+            "total_badness": 369.95189199
         },
         {
             "angles_tet": [
                 20.8,
-                140.12
+                137.89
             ],
             "angles_trig": [
                 21.077,
@@ -501,54 +501,54 @@
             ],
             "ne1d": 190,
             "ne2d": 300,
-            "ne3d": 633,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 2, 7, 20, 39, 56, 55, 111, 96, 80, 83, 55, 25, 4]",
-            "total_badness": 919.1584555
+            "ne3d": 631,
+            "quality_histogram": "[0, 0, 0, 0, 1, 0, 0, 3, 8, 27, 48, 60, 69, 107, 85, 89, 64, 48, 20, 2]",
+            "total_badness": 943.22810332
         },
         {
             "angles_tet": [
-                5.9887,
-                162.04
+                5.1036,
+                168.02
             ],
             "angles_trig": [
-                13.633,
+                12.696,
                 150.46
             ],
             "ne1d": 262,
             "ne2d": 726,
-            "ne3d": 2023,
-            "quality_histogram": "[0, 3, 2, 11, 31, 76, 116, 93, 80, 43, 38, 52, 90, 195, 227, 293, 281, 223, 133, 36]",
-            "total_badness": 3469.7404067
+            "ne3d": 2083,
+            "quality_histogram": "[0, 2, 6, 20, 50, 80, 113, 89, 78, 45, 36, 73, 98, 176, 267, 270, 286, 225, 135, 34]",
+            "total_badness": 3674.0021566
         },
         {
             "angles_tet": [
-                23.833,
-                141.99
+                24.1,
+                141.88
             ],
             "angles_trig": [
-                23.082,
-                116.18
+                23.859,
+                119.8
             ],
             "ne1d": 378,
             "ne2d": 1412,
-            "ne3d": 7796,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 3, 8, 34, 125, 288, 492, 851, 1322, 1544, 1550, 1212, 367]",
-            "total_badness": 9700.3117232
+            "ne3d": 7670,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 2, 7, 36, 112, 284, 477, 845, 1308, 1555, 1517, 1168, 359]",
+            "total_badness": 9545.7928464
         },
         {
             "angles_tet": [
-                24.435,
-                143.51
+                24.428,
+                143.27
             ],
             "angles_trig": [
-                24.282,
-                121.95
+                24.968,
+                121.61
             ],
             "ne1d": 624,
             "ne2d": 3944,
-            "ne3d": 38258,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 4, 14, 63, 223, 668, 1796, 3698, 6025, 8126, 8752, 6655, 2234]",
-            "total_badness": 46480.533567
+            "ne3d": 38337,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 5, 12, 70, 233, 701, 1858, 3746, 6011, 8031, 8828, 6611, 2231]",
+            "total_badness": 46629.830149
         }
     ],
     "cubeandspheres.geo": [
@@ -646,63 +646,63 @@
     "cubemcyl.geo": [
         {
             "angles_tet": [
-                18.025,
-                150.96
+                19.095,
+                148.41
             ],
             "angles_trig": [
-                19.513,
-                133.51
+                19.819,
+                130.08
             ],
             "ne1d": 142,
             "ne2d": 2488,
-            "ne3d": 20418,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 3, 14, 49, 202, 394, 845, 1593, 2466, 3106, 3519, 3405, 2750, 1635, 437]",
-            "total_badness": 27308.898163
+            "ne3d": 20377,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 3, 13, 54, 165, 390, 900, 1554, 2429, 3089, 3513, 3446, 2730, 1633, 458]",
+            "total_badness": 27224.35447
         },
         {
             "angles_tet": [
                 20.47,
-                140.14
+                141.07
             ],
             "angles_trig": [
-                17.578,
-                126.88
+                17.455,
+                137.29
             ],
             "ne1d": 64,
             "ne2d": 642,
-            "ne3d": 3267,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 1, 10, 25, 61, 132, 206, 350, 474, 527, 539, 435, 328, 157, 22]",
-            "total_badness": 4603.1212688
+            "ne3d": 3261,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 2, 17, 24, 62, 115, 220, 353, 475, 545, 510, 445, 318, 143, 32]",
+            "total_badness": 4608.5480688
         },
         {
             "angles_tet": [
-                22.382,
-                143.35
+                20.675,
+                143.54
             ],
             "angles_trig": [
-                18.374,
-                130.35
+                14.769,
+                129.61
             ],
             "ne1d": 102,
             "ne2d": 1402,
-            "ne3d": 8310,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 2, 4, 28, 59, 209, 415, 702, 1096, 1322, 1458, 1327, 950, 571, 167]",
-            "total_badness": 11254.481655
+            "ne3d": 8209,
+            "quality_histogram": "[0, 0, 0, 0, 0, 2, 4, 4, 26, 56, 216, 420, 704, 1026, 1323, 1412, 1302, 954, 587, 173]",
+            "total_badness": 11118.365255
         },
         {
             "angles_tet": [
-                21.525,
-                144.69
+                21.997,
+                146.77
             ],
             "angles_trig": [
-                23.793,
-                122.54
+                23.524,
+                123.14
             ],
             "ne1d": 142,
             "ne2d": 2488,
-            "ne3d": 19408,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 1, 8, 44, 109, 424, 991, 1840, 2835, 3532, 3751, 3227, 2104, 542]",
-            "total_badness": 24892.465354
+            "ne3d": 19366,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 3, 7, 43, 115, 406, 1004, 1806, 2745, 3564, 3751, 3220, 2125, 577]",
+            "total_badness": 24813.005671
         },
         {
             "angles_tet": [
@@ -738,33 +738,33 @@
     "cubemsphere.geo": [
         {
             "angles_tet": [
-                18.771,
-                145.97
+                18.937,
+                145.89
             ],
             "angles_trig": [
-                21.404,
-                128.34
+                21.407,
+                128.79
             ],
             "ne1d": 90,
             "ne2d": 702,
-            "ne3d": 4832,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 1, 6, 10, 60, 96, 207, 372, 599, 721, 814, 768, 688, 386, 104]",
-            "total_badness": 6481.1187794
+            "ne3d": 4814,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 4, 10, 55, 89, 206, 386, 582, 723, 808, 801, 647, 392, 111]",
+            "total_badness": 6443.9958085
         },
         {
             "angles_tet": [
-                15.952,
-                150.19
+                17.436,
+                150.08
             ],
             "angles_trig": [
-                14.233,
-                127.99
+                14.077,
+                130.7
             ],
             "ne1d": 44,
             "ne2d": 274,
-            "ne3d": 786,
-            "quality_histogram": "[0, 0, 0, 0, 1, 3, 8, 9, 33, 46, 85, 95, 112, 103, 87, 76, 59, 33, 28, 8]",
-            "total_badness": 1260.9360809
+            "ne3d": 769,
+            "quality_histogram": "[0, 0, 0, 0, 1, 3, 9, 15, 28, 41, 69, 78, 114, 88, 96, 95, 62, 35, 31, 4]",
+            "total_badness": 1221.5992458
         },
         {
             "angles_tet": [
@@ -783,48 +783,48 @@
         },
         {
             "angles_tet": [
-                24.86,
-                138.52
+                22.975,
+                142.5
             ],
             "angles_trig": [
-                22.159,
-                120.51
+                21.962,
+                120.34
             ],
             "ne1d": 90,
             "ne2d": 702,
-            "ne3d": 4632,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 3, 20, 47, 99, 242, 464, 688, 808, 898, 763, 453, 147]",
-            "total_badness": 5974.4782285
+            "ne3d": 4601,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 4, 21, 45, 92, 246, 466, 682, 801, 899, 738, 477, 130]",
+            "total_badness": 5937.2722105
         },
         {
             "angles_tet": [
-                25.47,
-                139.67
+                25.354,
+                139.69
             ],
             "angles_trig": [
-                24.507,
+                24.508,
                 122.25
             ],
             "ne1d": 146,
             "ne2d": 1492,
-            "ne3d": 17955,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 1, 13, 51, 178, 420, 1013, 1930, 3073, 3841, 3759, 2846, 830]",
-            "total_badness": 22106.809834
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