diff --git a/src/VTKWriter/VTKWriter.hpp b/src/VTKWriter/VTKWriter.hpp
index 1cb7fcb544f00f1cdcff835ff6f653963fce1d8f..e1ab85783f8713c332e6d27b59f6faf0ea1234eb 100644
--- a/src/VTKWriter/VTKWriter.hpp
+++ b/src/VTKWriter/VTKWriter.hpp
@@ -40,10 +40,6 @@ template <typename T> std::string getType()
 		return "int";
 	else if (typeid(T) == typeid(unsigned int))
 		return "unsigned_int";
-	else if (typeid(T) == typeid(long int))
-		return "long";
-	else if (typeid(T) == typeid(unsigned long int))
-		return "unsigned_long";
 	else if (typeid(T) == typeid(bool))
 		return "bit";
 
diff --git a/src/VTKWriter/VTKWriter_graph_util.hpp b/src/VTKWriter/VTKWriter_graph_util.hpp
deleted file mode 100644
index 5729045f2b7eb317eecca9e083b8bbfbefa55285..0000000000000000000000000000000000000000
--- a/src/VTKWriter/VTKWriter_graph_util.hpp
+++ /dev/null
@@ -1,15 +0,0 @@
-/*
- * VTKWriter_graph_util.hpp
- *
- *  Created on: Mar 12, 2016
- *      Author: i-bird
- */
-
-#ifndef OPENFPM_IO_SRC_VTKWRITER_VTKWRITER_GRAPH_UTIL_HPP_
-#define OPENFPM_IO_SRC_VTKWRITER_VTKWRITER_GRAPH_UTIL_HPP_
-
-
-
-
-
-#endif /* OPENFPM_IO_SRC_VTKWRITER_VTKWRITER_GRAPH_UTIL_HPP_ */
diff --git a/src/VTKWriter/VTKWriter_grids_util.hpp b/src/VTKWriter/VTKWriter_grids_util.hpp
index e3238966b8445f42d934175c94c0565d20719ea7..5b081437a4c2d11abb90c9a02175ffebe0f8283c 100644
--- a/src/VTKWriter/VTKWriter_grids_util.hpp
+++ b/src/VTKWriter/VTKWriter_grids_util.hpp
@@ -291,7 +291,7 @@ struct meta_prop<I, ele_g,St,T[N1],is_writable>
 						for (size_t i1 = 0 ; i1 < N1 ; i1++)
 						{
 							tmp = vg.get(k).g.get_o(it.get()).template get<I::value>()[i1];
-							swap_endian_lt(tmp);
+							tmp = swap_endian_lt(tmp);
 							v_out.append((const char *)&tmp,sizeof(T));
 						}
 						if (N1 == 2)
diff --git a/src/VTKWriter/is_vtk_writable.hpp b/src/VTKWriter/is_vtk_writable.hpp
index 44a5b9c6148f38bcc334dcb940f2b29cecbe160b..018afd9d46395d922a4850ff5eac32924763532a 100644
--- a/src/VTKWriter/is_vtk_writable.hpp
+++ b/src/VTKWriter/is_vtk_writable.hpp
@@ -185,7 +185,7 @@ struct is_vtk_writable<long int>
 	//! long int is vtk writable
 	enum
 	{
-		value = true
+		value = false
 	};
 };
 
@@ -196,7 +196,7 @@ struct is_vtk_writable<unsigned long int>
 	//! unsigned long int is vtk writable
 	enum
 	{
-		value = true
+		value = false
 	};
 };