diff --git a/EXE_GdbCreateSurf.cpp b/EXE_GdbCreateSurf.cpp
index 56971ba..59ae3e7 100644
--- a/EXE_GdbCreateSurf.cpp
+++ b/EXE_GdbCreateSurf.cpp
@@ -222,7 +222,7 @@ ExeCreateSurfFrDisk( int nParentId, const Point3d& ptOrig, double dRad, int nRef
 
 //-------------------------------------------------------------------------------
 int
-ExeCreateSurfFrFatCurve( int nParentId, int nCrvId, double dRad, bool bSquaredEnds, bool bSquaredMids)
+ExeCreateSurfFrFatCurve( int nParentId, int nCrvId, double dRad, bool bSquaredEnds, bool bSquaredMids, double dLinTol)
 {
    IGeomDB* pGeomDB = GetCurrGeomDB() ;
    VERIFY_GEOMDB( pGeomDB, GDB_ID_NULL)
@@ -245,7 +245,7 @@ ExeCreateSurfFrFatCurve( int nParentId, int nCrvId, double dRad, bool bSquaredEn
   // eseguo la trasformazione (viene eseguita solo se i riferimenti sono diversi
    pCopCrv->LocToLoc( frCrv, frLoc) ;
   // creo la regione
-   PtrOwner<ISurfFlatRegion> pSfr( GetSurfFlatRegionFromFatCurve( Release( pCopCrv), dRad, bSquaredEnds, bSquaredMids)) ;
+   PtrOwner<ISurfFlatRegion> pSfr( GetSurfFlatRegionFromFatCurve( Release( pCopCrv), dRad, bSquaredEnds, bSquaredMids, dLinTol)) ;
    bOk = bOk && ! IsNull( pSfr) ;
   // inserisco la superficie nel DB
    int nNewId = ( bOk ? pGeomDB->AddGeoObj( GDB_ID_NULL, nParentId, Release( pSfr)) : GDB_ID_NULL) ;
diff --git a/EXE_GdbModifyCurve.cpp b/EXE_GdbModifyCurve.cpp
index bbbe097..81db255 100644
--- a/EXE_GdbModifyCurve.cpp
+++ b/EXE_GdbModifyCurve.cpp
@@ -102,14 +102,14 @@ ExeOffsetCurve( int nId, double dDist, int nType)
 
 //----------------------------------------------------------------------------
 int
-ExeOffsetCurveAdv( int nId, double dDist, int nType, int* pnCount)
+ExeOffsetCurveAdv( int nId, double dDist, int nType, int* pnCount, double dLinTol)
 {
    IGeomDB* pGeomDB = GetCurrGeomDB() ;
    VERIFY_GEOMDB( pGeomDB, GDB_ID_NULL)
   // recupero la curva
    const ICurve* pCurve = GetCurve( pGeomDB->GetGeoObj( nId)) ;
   // eseguo l'offset
-   OffsetCurve OffsCrv ;
+   OffsetCurve OffsCrv( dLinTol) ;
    bool bOk = OffsCrv.Make( pCurve, dDist, nType) ;
   // salvo le curve di offset
    int nRefId = nId ;
diff --git a/EgtExecutor.rc b/EgtExecutor.rc
index c3d5625..133ffaf 100644
Binary files a/EgtExecutor.rc and b/EgtExecutor.rc differ
diff --git a/LUA_GdbCreateSurf.cpp b/LUA_GdbCreateSurf.cpp
index 18f4830..13db858 100644
--- a/LUA_GdbCreateSurf.cpp
+++ b/LUA_GdbCreateSurf.cpp
@@ -147,7 +147,7 @@ LuaCreateSurfFlatRegion( lua_State* L)
 static int
 LuaCreateSurfFrFatCurve( lua_State* L)
 {
-  // 4 o 5 parametri : ParentId, nCrvId, dRad, bSquared [,bSquaredMids]
+  // 4 o 5 o 6 parametri : ParentId, nCrvId, dRad, bSquared [, bSquaredMids] [, dLinTol]
    int nParentId ;
    LuaCheckParam( L, 1, nParentId)
    int nCrvId ;
@@ -158,9 +158,11 @@ LuaCreateSurfFrFatCurve( lua_State* L)
    LuaCheckParam( L, 4, bSquared)
    bool bSquaredMids = bSquared ;
    LuaGetParam( L, 5, bSquaredMids) ;
+   double dLinTol = 10 * EPS_SMALL ;
+   LuaGetParam( L, 6, dLinTol) ;
    LuaClearStack( L) ;
   // creo una regione piana
-   int nId = ExeCreateSurfFrFatCurve( nParentId, nCrvId, dRad, bSquared, bSquaredMids) ;
+   int nId = ExeCreateSurfFrFatCurve( nParentId, nCrvId, dRad, bSquared, bSquaredMids, dLinTol) ;
   // restituisco il risultato
    if ( nId != GDB_ID_NULL)
       LuaSetParam( L, nId) ;
diff --git a/LUA_GdbModifyCurve.cpp b/LUA_GdbModifyCurve.cpp
index 8e55001..e952639 100644
--- a/LUA_GdbModifyCurve.cpp
+++ b/LUA_GdbModifyCurve.cpp
@@ -60,17 +60,19 @@ LuaOffsetCurve( lua_State* L)
 static int
 LuaOffsetCurveAdv( lua_State* L)
 {
-  // 2 o 3 parametri : Id, dDist [, nType]
+  // 2 o 3 o 4 parametri : Id, dDist [, nType] [, dLinTol]
    int nId ;
    LuaCheckParam( L, 1, nId)
    double dDist ;
    LuaCheckParam( L, 2, dDist)
    int nType = ICurve::OFF_FILLET ;
    LuaGetParam( L, 3, nType) ;
+   double dLinTol = 10 * EPS_SMALL ;
+   LuaGetParam( L, 4, dLinTol) ;
    LuaClearStack( L) ;
   // offset della curva
    int nCount ;
-   int nNewId = ExeOffsetCurveAdv( nId, dDist, nType, &nCount) ;
+   int nNewId = ExeOffsetCurveAdv( nId, dDist, nType, &nCount, dLinTol) ;
    if ( nCount >= 0) {
       LuaSetParam( L, nNewId) ;
       LuaSetParam( L, nCount) ;