diff --git a/nglib/Makefile.am b/nglib/Makefile.am
index c46af5a7..667cef5f 100644
--- a/nglib/Makefile.am
+++ b/nglib/Makefile.am
@@ -2,7 +2,8 @@ include_HEADERS = nglib.h
 
 dist_pkgdata_DATA = cube.surf
 
-AM_CPPFLAGS = -I$(top_srcdir)/libsrc/include $(OCCFLAGS)  $(MPI_INCLUDES) 
+AM_CPPFLAGS = -I$(top_srcdir)/libsrc/include  $(MPI_INCLUDES) 
+#  $(OCCFLAGS)
 
 lib_LTLIBRARIES = libnglib.la
 libnglib_la_SOURCES = nglib.cpp
diff --git a/nglib/nglib.cpp b/nglib/nglib.cpp
index 74edfe2d..04b85320 100644
--- a/nglib/nglib.cpp
+++ b/nglib/nglib.cpp
@@ -641,7 +641,7 @@ DLL_HEADER Ng_Result Ng_OCC_GetFMap(Ng_OCC_Geometry * geom,
    }
    else
    {
-      return -1;
+      return NG_ERROR;
    }
 }
 
diff --git a/nglib/nglib.h b/nglib/nglib.h
index 8f9440cd..5cf62fd2 100644
--- a/nglib/nglib.h
+++ b/nglib/nglib.h
@@ -74,7 +74,9 @@ enum Ng_Volume_Element_Type
 
 /// Values returned by Netgen functions
 enum Ng_Result 
-   { NG_OK                  = 0, 
+   { 
+     NG_ERROR               = -1,   
+     NG_OK                  = 0, 
      NG_SURFACE_INPUT_ERROR = 1,
      NG_VOLUME_FAILURE      = 2, 
      NG_STL_INPUT_ERROR     = 3,