diff --git a/EXE_GdbModifyCurve.cpp b/EXE_GdbModifyCurve.cpp
index 30c4782..6263fe9 100644
--- a/EXE_GdbModifyCurve.cpp
+++ b/EXE_GdbModifyCurve.cpp
@@ -237,7 +237,8 @@ ExeApproxCurve( int nId, int nApprType, double dLinTol, double dMaxSegmLen)
    if ( IsCmdLog()) {
       string sLua = "EgtApproxCurve(" + ToString( nId) + "," +
                                         ApproxTypeToString( nApprType) + "," +
-                                        ToString( dLinTol) + ")" +
+                                        ToString( dLinTol) + "," +
+                                        ToString( dMaxSegmLen) + ")" +
                     " -- Ok=" + ToString( bOk) ;
       LOG_INFO( GetCmdLogger(), sLua.c_str()) ;
    }
diff --git a/EgtExecutor.rc b/EgtExecutor.rc
index 5a3e372..2207683 100644
Binary files a/EgtExecutor.rc and b/EgtExecutor.rc differ
diff --git a/LUA_GdbGetCurve.cpp b/LUA_GdbGetCurve.cpp
index eca8813..e22d111 100644
--- a/LUA_GdbGetCurve.cpp
+++ b/LUA_GdbGetCurve.cpp
@@ -558,7 +558,7 @@ LuaCurveCompoNormVersor( lua_State* L)
    int nRefId = nId ;
    LuaGetParam( L, 3, nRefId) ;
    LuaClearStack( L) ;
-  // recupero l'angolo al centro della curva semplice indicizzata
+  // recupero il versore normale della curva semplice indicizzata (non nullo solo se arco)
    Vector3d vtNorm ;
    if ( ExeCurveCompoNormVersor( nId, nCrv, nRefId, vtNorm))
       LuaSetParam( L, vtNorm) ;
@@ -571,13 +571,15 @@ LuaCurveCompoNormVersor( lua_State* L)
 static int
 LuaCurveCompoGetTempProp( lua_State* L)
 {
-  // 1 parametro : Id
+  // 1 o 2 parametri : Id [, nPropInd]
    int nId ;
    LuaCheckParam( L, 1, nId)
+   int nPropInd = 0 ;
+   LuaGetParam( L, 2, nPropInd) ;
    LuaClearStack( L) ;
-  // recupero l'angolo al centro della curva semplice indicizzata
+  // recupero il vettore delle proprietà temporanee di indice dato
    INTVECTOR vProp ;
-   if ( ExeCurveCompoGetTempProp( nId, vProp, 0))
+   if ( ExeCurveCompoGetTempProp( nId, vProp, nPropInd))
       LuaSetParam( L, vProp) ;
    else
       LuaSetParam( L) ;
@@ -588,13 +590,15 @@ LuaCurveCompoGetTempProp( lua_State* L)
 static int
 LuaCurveCompoGetTempParam( lua_State* L)
 {
-  // 1 parametro : Id
+  // 1 o 2 parametri : Id [, nParamInd]
    int nId ;
    LuaCheckParam( L, 1, nId)
+   int nParamInd = 0 ;
+   LuaGetParam( L, 2, nParamInd) ;
    LuaClearStack( L) ;
-  // recupero l'angolo al centro della curva semplice indicizzata
+  // recupero il vettore dei parametri temporanei di indice dato
    DBLVECTOR vParam ;
-   if ( ExeCurveCompoGetTempParam( nId, vParam, 0))
+   if ( ExeCurveCompoGetTempParam( nId, vParam, nParamInd))
       LuaSetParam( L, vParam) ;
    else
       LuaSetParam( L) ;
diff --git a/LUA_MachMgr.cpp b/LUA_MachMgr.cpp
index 6a51f08..6e1e133 100644
--- a/LUA_MachMgr.cpp
+++ b/LUA_MachMgr.cpp
@@ -3708,7 +3708,7 @@ LuaGetCalcPositions( lua_State* L)
 static int
 LuaGetCalcTipFromPositions( lua_State* L)
 {
-  // da 4 a 10 parametri : dX, dY, dZ, dAngR1[, dAngR2][, dAngR3][, dAngR4][, dAngR5][, dAngR6][, bBottom]
+  // da 3 a 10 parametri : dX, dY, dZ [, dAngR1] [, dAngR2] [, dAngR3] [, dAngR4] [, dAngR5] [, dAngR6] [, bBottom]
    double dX ;
    LuaCheckParam( L, 1, dX)
    double dY ;
@@ -3742,7 +3742,7 @@ LuaGetCalcTipFromPositions( lua_State* L)
 static int
 LuaGetCalcToolDirFromAngles( lua_State* L)
 {
-  // da 1 a 6 parametri : dAngR1, dAngR2, dAngR3, dAngR4, dAngR5, dAngR6
+  // da 0 a 6 parametri : [dAngR1] [, dAngR2] [, dAngR3] [, dAngR4] [, dAngR5] [, dAngR6]
    DBLVECTOR vAng ;
    for ( int i = 1 ; i <= 6 ; ++ i) {
       double dAng ;
@@ -3767,7 +3767,7 @@ LuaGetCalcToolDirFromAngles( lua_State* L)
 static int
 LuaGetCalcAuxDirFromAngles( lua_State* L)
 {
-  // da 1 a 6 parametri : dAngR1, dAngR2, dAngR3, dAngR4, dAngR5, dAngR6 
+  // da 0 a 6 parametri : [dAngR1] [, dAngR2] [, dAngR3] [, dAngR4] [, dAngR5] [, dAngR6]
    DBLVECTOR vAng ;
    for ( int i = 1 ; i <= 6 ; ++ i) {
       double dAng ;