diff --git a/EExImport3MF.h b/EExImport3MF.h
new file mode 100644
index 0000000..b5e73de
--- /dev/null
+++ b/EExImport3MF.h
@@ -0,0 +1,38 @@
+//----------------------------------------------------------------------------
+//  EgalTech 2021-2021
+//----------------------------------------------------------------------------
+// File : EExImport3MF.h          Data : 28.01.21          Versione : 2.3a5
+// Contenuto : Dichiarazione della interfaccia IImport3MF.
+//
+//
+//
+// Modifiche : 28.01.21 DS Creazione modulo.
+//
+//
+//----------------------------------------------------------------------------
+
+#pragma once
+
+#include "/EgtDev/Include/EgkGeomDB.h"
+#include <string>
+
+//----------------------- Macro per import/export ----------------------------
+#undef EEK_EXPORT
+#if defined( I_AM_EEX)            // da definirsi solo nella DLL
+   #define EEX_EXPORT __declspec( dllexport)
+#else
+   #define EEX_EXPORT __declspec( dllimport)
+#endif
+
+//-----------------------------------------------------------------------------
+class __declspec( novtable) IImport3MF
+{
+   public :
+      virtual ~IImport3MF( void) {} 
+      virtual bool Import( const std::string& sFile, IGeomDB* pGDB, int nIdGroup) = 0 ;
+} ;
+
+//-----------------------------------------------------------------------------
+extern "C" {
+   EEX_EXPORT IImport3MF* CreateImport3MF( void) ;
+}
diff --git a/EGkIntersLineSurfTm.h b/EGkIntersLineSurfTm.h
index a3008ea..e344c28 100644
--- a/EGkIntersLineSurfTm.h
+++ b/EGkIntersLineSurfTm.h
@@ -54,7 +54,7 @@ class IntersParLinesSurfTm
 {
    public :
       EGK_EXPORT IntersParLinesSurfTm( const Frame3d& frLines, const ISurfTriMesh& Stm) ;
-      EGK_EXPORT bool GetInters( const Point3d& ptL, double dLen, ILSIVECTOR& vInfo, bool bFinite = true) ;
+      EGK_EXPORT bool GetInters( const Point3d& ptL, double dLen, ILSIVECTOR& vInfo, bool bFinite = true) const ;
 
    private :
       bool                m_bOk ;
diff --git a/EInAPI.h b/EInAPI.h
index fc8d08d..d373ec7 100644
--- a/EInAPI.h
+++ b/EInAPI.h
@@ -107,6 +107,7 @@ EIN_EXPORT BOOL __stdcall EgtImportCsf( const wchar_t* wsFilePath) ;
 EIN_EXPORT BOOL __stdcall EgtImportDxf( const wchar_t* wsFilePath, double dScaleFactor) ;
 EIN_EXPORT BOOL __stdcall EgtImportPnt( const wchar_t* wsFilePath, int nFlag) ;
 EIN_EXPORT BOOL __stdcall EgtImportStl( const wchar_t* wsFilePath, double dScaleFactor) ;
+EIN_EXPORT BOOL __stdcall EgtImport3MF( const wchar_t* wsFilePath) ;
 EIN_EXPORT BOOL __stdcall EgtAdvancedImportIsEnabled( void) ;
 EIN_EXPORT BOOL __stdcall EgtAdvancedImport( const wchar_t* wsFilePath, double dLinToler) ;
 EIN_EXPORT BOOL __stdcall EgtExportDxf( int nId, const wchar_t* wsFilePath, int nFlag) ;
diff --git a/EXeConst.h b/EXeConst.h
index 2c2d4ee..d3375fb 100644
--- a/EXeConst.h
+++ b/EXeConst.h
@@ -27,6 +27,7 @@ enum FileType { FT_NULL =  0,
                 FT_PNT =  17,
                 FT_SVG =  18,
                 FT_BTLX = 19,
+                FT_3MF =  20,
                 FT_IGES = 31,
                 FT_STEP = 32,
                 FT_ACIS = 33,
diff --git a/EXeExecutor.h b/EXeExecutor.h
index 43e32fc..6477e94 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -113,6 +113,7 @@ EXE_EXPORT bool ExeImportCsf( const std::string& sFilePath) ;
 EXE_EXPORT bool ExeImportDxf( const std::string& sFilePath, double dScaleFactor) ;
 EXE_EXPORT bool ExeImportPnt( const std::string& sFilePath, int nFlag) ;
 EXE_EXPORT bool ExeImportStl( const std::string& sFilePath, double dScaleFactor) ;
+EXE_EXPORT bool ExeImport3MF( const std::string& sFilePath) ;
 EXE_EXPORT bool ExeAdvancedImportIsEnabled( void) ;
 EXE_EXPORT bool ExeAdvancedImport( const std::string& sFilePath, double dToler = 0.1) ;
 EXE_EXPORT bool ExeExportDxf( int nId, const std::string& sFilePath, int nFlag = 1) ;