diff --git a/src/cad/gcs/GlobalSolver.java b/src/cad/gcs/GlobalSolver.java
index 098d6997..317c619c 100644
--- a/src/cad/gcs/GlobalSolver.java
+++ b/src/cad/gcs/GlobalSolver.java
@@ -15,8 +15,6 @@ import java.lang.*;
 import java.util.ArrayList;
 import java.util.Arrays;
 
-import static java.lang.Math.abs;
-
 public class GlobalSolver {
 
   public static void globalSolve(Solver.SubSystem subSystem, Runnable linearSolvedCallback) {
@@ -28,20 +26,17 @@ public class GlobalSolver {
 //    }
 
     double eps = 0.0001;
-    java.lang.System.out.println("Solve system with error: " + subSystem.errorSquared());
-    boolean triedShrink = false;
-    while (abs(subSystem.value()) > eps && !triedShrink) {
-//      solveLM_COMMONS(subSystem);
+    java.lang.System.out.println("Solve system with error: " + subSystem.value());
+    int count = 0;
+    while (subSystem.valueSquared() > eps && (count++ < 100)) {
+      solveLM_COMMONS(subSystem);
+//      Solver.solve_BFGS(subSystem, false);
 //    Solver.solve_LM(subSystem);
-      Solver.solve_BFGS(subSystem, false);
-      if (abs(subSystem.value()) > eps) {
+      if (Math.abs(subSystem.valueSquared()) > eps) {
 //        solveWorse(subSystem, eps);
         if(subSystem.constraints.size() > 1) {
           Solver.SubSystem shrunk = shrink(subSystem);
-          triedShrink = true;
           globalSolve(shrunk, linearSolvedCallback);
-        } else {
-          return;
         }
       }
       linearSolvedCallback.run();
diff --git a/src/cad/gcs/Solver.java b/src/cad/gcs/Solver.java
index 8aac7824..915a170b 100644
--- a/src/cad/gcs/Solver.java
+++ b/src/cad/gcs/Solver.java
@@ -813,7 +813,7 @@ public class Solver {
     public double value() {
       double err = 0.;
       for (Constraint c : constraints) {
-        err += c.error();
+        err += Math.abs(c.error());
       }
       return err;
     }
@@ -885,13 +885,14 @@ public class Solver {
         out.setEntry(i, 0, v);
       }
     }
+
+
   }
 
   private static double dotProduct(RealMatrix m1, RealMatrix m2) {
     return new ArrayRealVector(m1.getData()[0]).dotProduct(new ArrayRealVector(m2.getData()[0]));
   }
 
-
   static double XconvergenceRough = 1e-8;
   static double XconvergenceFine = 1e-10;
   static double smallF = 1e-20;