Fix THE BUG...

AMDiS/src/parallel/PetscSolverGlobalMatrix.cc

@@ -404,7 +404,6 @@ namespace AMDiS {
 
     MatNullSpace matNullspace;
     Vec nullspaceBasis;
-
     if (nullspace.size() > 0 || 
 	hasConstantNullspace ||
 	constNullspaceComponent.size() > 0) {
@@ -456,7 +455,6 @@ namespace AMDiS {
 	("No nullspace provided that should be removed from rhs!\n");
     }
 
-
     // PETSc.
     solve(rhsInterior, petscSolVec);
 
@@ -482,6 +480,10 @@ namespace AMDiS {
     }
 
     VecRestoreArray(petscSolVec, &vecPointer);
+
+    // === Synchronize DOFs at common DOFs, i.e., DOFs that correspond to ===  
+    // === more than one partition.                                       ===  
+    meshDistributor->synchVector(vec);
   }