2d Incision with Phantom omni

Hi everyone,

I am a bit new in SOFA, and hope you could help me out.
I try to make a incision with the Phantom Omni. I use a 2d model and the interaction between phantom and model works well. When i do the incision with the mouse, the incision is done, but when i touch the model with the phantom, the program stops and turns out. The output of sofa is:

########## SIG 11 – SIGSEGV: segfault ####

are there any solution for this problem?

This is my code:

<?xml version="1.0" ?>
<Node name="root" dt="0.1" showBoundingTree="0" gravity="0 0 0" >
	<RequiredPlugin name="SofaOpenglVisual"/>
    <RequiredPlugin pluginName='SofaHaptics'/>
	<RequiredPlugin pluginName='SofaSparseSolver'/>
	<RequiredPlugin pluginName='SofaMiscCollision'/>
	<VisualStyle displayFlags="showCollisionModels" />
	<RequiredPlugin name="Geomagic plugin" pluginName="Geomagic" />
    <DefaultPipeline name="pipeline" depth="6" verbose="0"/>
	<BruteForceDetection name="detection" />
    <DefaultContactManager name="response" response="FrictionContact" />
	<MinProximityIntersection name="Proximity" alarmDistance="1" contactDistance="0.05"/>

	<FreeMotionAnimationLoop/>
	<LCPConstraintSolver tolerance="0.001" maxIt="1000"/>
	
	<GeomagicDriver name="GeomagicDevice" deviceName="Default Device" scale="1" positionBase="0 0 8" orientationBase="0.707 0 0 0.707"
	  drawDevice="0" drawDeviceFrame="0" forceFeedBack="@Instrument/LCPFF1"/>
	
	<Node name="Mesh">
		<EulerImplicitSolver name="cg_odesolver" printLog="false"  rayleighStiffness="0.1" rayleighMass="0.1" />
		<CGLinearSolver template="GraphScattered" name="linear solver" iterations="25" tolerance="1.0e-9" threshold="1.0e-9" />
		<MeshGmshLoader name="loader"  filename="mesh/cube.msh" createSubelements="true"/>
        <MechanicalObject src="@loader" name="default4" scale3d="7 4 5"/>

		<FixedConstraint template="Vec3d" name="Fixed Dofs" indices="0 4 20 24  70 74" drawSize="0" />
		<FixedPlaneConstraint template="Vec3d" name="defaultPlane" direction="0 0 1" dmin="-15"/>

		<TriangleSetTopologyContainer src="@loader" name="Triangle_topo" />
        <TriangleSetTopologyModifier name="Modifier" />
        <TriangleSetTopologyAlgorithms name="TopoAlgo" />
        <TriangleSetGeometryAlgorithms name="GeomAlgo" />
        <DiagonalMass name="default5" massDensity="1.5" />
		<TriangularFEMForceField name="FEM" youngModulus="60" poissonRatio="0.35" method="large" showStressValue="false" showStressVector="false"
			showFracturableTriangles="true" hosfordExponant="10.0" criteriaValue="10000" computePrincipalStress="true" />
		<PrecomputedConstraintCorrection recompute="true"/>	

		<TriangleCollisionModel name="cmTriangles" contactStiffness="5000" />
		<LineCollisionModel name="cmLines" contactStiffness="5000" />
		<PointCollisionModel name="cmPoints" contactStiffness="5000" />
		
		<Node name="edges">
            <EdgeSetTopologyContainer name="Edge_topo" />
            <EdgeSetTopologyModifier name="Modifier" />
            <EdgeSetTopologyAlgorithms template="Vec3d" name="TopoAlgo" />
            <EdgeSetGeometryAlgorithms template="Vec3d" name="GeomAlgo" drawEdges="1" />
            <Triangle2EdgeTopologicalMapping name="Mapping" input="@../Triangle_topo" output="@Edge_topo" />
        </Node>
	
        <Node >
			<OglModel name="Visual" material="Default Diffuse 1 0 1 0 0.75 Ambient 0 1 1 1 1 Specular 1 1 1 0 1 Emissive 0 1 1 0 1 Shininess 1 100"/>
            <IdentityMapping name="default8" input="@.." output="@Visual" />
        </Node>
	</Node>	
	<Node name="Omni">
        <MechanicalObject template="Rigid3" name="DOFs" position="@GeomagicDevice.positionDevice"/>
        <MechanicalStateController template="Rigid3" listening="true" mainDirection="-1.0 0.0 0.0" handleEventTriggersUpdate="true"/>
    </Node>
	
	<Node name="Instrument" >
        <EulerImplicitSolver rayleighMass="0.01" rayleighStiffness="0.1" />
		<SparseLDLSolver />
        
		<MechanicalObject name="instrumentState" template="Rigid3" tags="GeomagicDevice" position="@../GeomagicDevice.positionBase"/>
		<UniformMass name="mass" totalMass="1" />
		
		<RestShapeSpringsForceField stiffness='100000000' angularStiffness='100000000' external_rest_shape='@../Omni/DOFs' points='0' external_points='0'/>
        <LCPForceFeedback name="LCPFF1" activate="true" forceCoef="0.2"/> 
        <LinearSolverConstraintCorrection />
		
        <Node name="VisuTool" >
            <MeshObjLoader name="meshLoader_1" filename="Demos/Dentistry/data/mesh/dental_instrument.obj" handleSeams="1" />
            <OglModel name="InstrumentVisualModel" src="@meshLoader_1" color="1.0 0.2 0.2 1.0" ry="-180" rz="-90" dz="3.5" dx="-0.3"/>
            <RigidMapping name="MM->VM mapping" input="@instrumentState" output="@InstrumentVisualModel" />
        </Node>
		
        
        <Node name="CollisionModel" >
            <MeshObjLoader filename="Demos/Dentistry/data/mesh/dental_instrument_centerline.obj"  name="loader"/>
            <MeshTopology src="@loader" name="InstrumentCollisionModel" />
            <MechanicalObject src="@loader" name="instrumentCollisionState" ry="-180" rz="-90" dz="3.5" dx="-0.3"/>
            <LineCollisionModel contactStiffness="100"/>			
            <PointCollisionModel contactStiffness="100"/>
            <RigidMapping name="MM->CM mapping" input="@instrumentState" output="@instrumentCollisionState" />		
        </Node>
    </Node> 
	
</Node>