diff --git a/apps/sample/trimesh_pos_demo/glwidget.cpp b/apps/sample/trimesh_pos_demo/glwidget.cpp
index 76f2db1e..6e347adb 100644
--- a/apps/sample/trimesh_pos_demo/glwidget.cpp
+++ b/apps/sample/trimesh_pos_demo/glwidget.cpp
@@ -70,9 +70,9 @@ QSize GLWidget::sizeHint() const
     return QSize(400, 400);
 }
 
-void GLWidget::LoadTriMesh( char* namefile)
+void GLWidget::LoadTriMesh(QString &namefile)
 {
-	vcg::tri::io::ImporterPLY<MyStraightMesh>::Open(mesh,namefile);
+	vcg::tri::io::ImporterPLY<MyStraightMesh>::Open(mesh,namefile.toAscii());
 	vcg::tri::UpdateBounding<MyStraightMesh>::Box(mesh);
 	vcg::tri::UpdateNormals<MyStraightMesh>::PerFace(mesh);
 	vcg::tri::UpdateNormals<MyStraightMesh>::PerVertex(mesh);
@@ -88,7 +88,7 @@ void GLWidget::OpenFile(){
 	
 	if (fileName.isEmpty())	return;
 	else
-	 LoadTriMesh((char*)fileName.data());
+	 LoadTriMesh( fileName );
 
 }
 
diff --git a/apps/sample/trimesh_pos_demo/glwidget.h b/apps/sample/trimesh_pos_demo/glwidget.h
index 0734e0c1..c0630e79 100644
--- a/apps/sample/trimesh_pos_demo/glwidget.h
+++ b/apps/sample/trimesh_pos_demo/glwidget.h
@@ -57,7 +57,7 @@ public slots:
     void flipE( );
     void flipF( );
     void nextE( );
-		void LoadTriMesh( char* namefile);
+		void LoadTriMesh(QString& namefile);
 		void OpenFile();
 
 protected:
diff --git a/apps/sample/trimesh_pos_demo/window.cpp b/apps/sample/trimesh_pos_demo/window.cpp
index c0c5c445..4c2e6799 100644
--- a/apps/sample/trimesh_pos_demo/window.cpp
+++ b/apps/sample/trimesh_pos_demo/window.cpp
@@ -52,7 +52,6 @@ Window::Window()
     mainLayout->addWidget(ldButton);
     setLayout(mainLayout);
 
-		glWidget->LoadTriMesh("torus.ply");
 		glWidget->glWrap.m = &glWidget->mesh; 
 
     setWindowTitle(tr("TriMesh Pos Demo"));