diff --git a/CMakeLists.txt b/CMakeLists.txt
index d2766638..e6df0df2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -172,7 +172,6 @@ if (USE_GUI)
         get_filename_component(MY_LIB_DIR ${TK_LIBRARY} DIRECTORY)
         install( DIRECTORY "${MY_LIB_DIR}/tcl8.6"   DESTINATION lib COMPONENT netgen )
         install( DIRECTORY "${MY_LIB_DIR}/tk8.6"    DESTINATION lib COMPONENT netgen )
-        install( DIRECTORY "${MY_LIB_DIR}/tix8.4.3" DESTINATION lib COMPONENT netgen )
         install( DIRECTORY "${MY_LIB_DIR}/../bin" DESTINATION . COMPONENT netgen )
         add_definitions(-DTOGL_WGL)
     else(WIN32)
diff --git a/libsrc/meshing/meshtype.hpp b/libsrc/meshing/meshtype.hpp
index dfdf889a..3703c6b6 100644
--- a/libsrc/meshing/meshtype.hpp
+++ b/libsrc/meshing/meshtype.hpp
@@ -344,6 +344,7 @@ namespace netgen
 	default:
 	  PrintSysError ("Element2d::SetType, illegal type ", int(typ));
 	}
+      is_curved = (np >= 4); 
     }
     ///
     int GetNP() const { return np; }
diff --git a/libsrc/occ/occgeom.hpp b/libsrc/occ/occgeom.hpp
index 9e79c2a1..ca74b5b0 100644
--- a/libsrc/occ/occgeom.hpp
+++ b/libsrc/occ/occgeom.hpp
@@ -441,8 +441,7 @@ namespace netgen
    // External access to the mesh generation functions within the OCC
    // subsystem (Not sure if this is the best way to implement this....!!)
    extern int OCCGenerateMesh (OCCGeometry & occgeometry, shared_ptr<Mesh> & mesh,
-			       MeshingParameters & mparam,
-			       int perfstepsstart, int perfstepsend);
+			       MeshingParameters & mparam);
 
   extern void OCCSetLocalMeshSize(OCCGeometry & geom, Mesh & mesh);