diff --git a/EXE_GdbCreateCurve.cpp b/EXE_GdbCreateCurve.cpp
index 299c046..b72f951 100644
--- a/EXE_GdbCreateCurve.cpp
+++ b/EXE_GdbCreateCurve.cpp
@@ -1091,6 +1091,44 @@ ExeCreateArc3P( int nParentId, const Point3d& ptP1,
    return nId ;
 }
 
+//-------------------------------------------------------------------------------
+int
+ExeCreateArc2PB( int nParentId, const Point3d& ptStart, const Point3d& ptEnd,
+                 double dBulge, int nRefType)
+{
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, GDB_ID_NULL)
+   nParentId = AdjustId( nParentId) ;
+  // recupero il riferimento locale
+   Frame3d frLoc ;
+   bool bOk = pGeomDB->GetGroupGlobFrame( nParentId, frLoc) ;
+  // porto in locale i punti, il versore normale e quelloe estrusione
+   Point3d ptStartL = GetPointLocal( pGeomDB, ptStart, nRefType, frLoc) ;
+   Point3d ptEndL = GetPointLocal( pGeomDB, ptEnd, nRefType, frLoc) ;
+   Vector3d vtNormL = GetVectorLocal( pGeomDB, Z_AX, nRefType, frLoc) ;
+   Vector3d vtExtrL = GetVectorLocal( pGeomDB, Z_AX, nRefType, frLoc) ;
+  // creo l'arco (in casi particolari retta)
+   PtrOwner<ICurve> pCrv( bOk ? GetArc2PNB( ptStartL, ptEndL, vtNormL, dBulge) : nullptr) ;
+   bOk = bOk && ! IsNull( pCrv) ;
+  // assegno il versore estrusione
+   bOk = bOk && pCrv->SetExtrusion( vtExtrL) ;
+  // inserisco l'arco nel DB
+   int nId = ( bOk ? pGeomDB->AddGeoObj( GDB_ID_NULL, nParentId, Release( pCrv)) : GDB_ID_NULL) ;
+   ExeSetModified() ;
+  // se richiesto, salvo il comando Lua equivalente
+   if ( IsCmdLog()) {
+      string sLua = "EgtArc2PB(" + IdToString( nParentId) + ",{" +
+                                   ToString( ptStart) + "},{" +
+                                   ToString( ptEnd) + "}," +
+                                   ToString( dBulge) + "," +
+                                   RefTypeToString( nRefType) + ")" +
+                    " -- Id=" + ToString( nId) ;
+      LOG_INFO( GetCmdLogger(), sLua.c_str()) ;
+   }
+  // restituisco l'identificativo della nuova entità
+   return nId ;
+}
+
 //-------------------------------------------------------------------------------
 int
 ExeCreateArc2PD( int nParentId, const Point3d& ptStart, const Point3d& ptEnd,
@@ -1099,20 +1137,17 @@ ExeCreateArc2PD( int nParentId, const Point3d& ptStart, const Point3d& ptEnd,
    IGeomDB* pGeomDB = GetCurrGeomDB() ;
    VERIFY_GEOMDB( pGeomDB, GDB_ID_NULL)
    nParentId = AdjustId( nParentId) ;
-  // creo l'arco (in casi particolari retta)
-   PtrOwner<ICurve> pCrv ;
-   bool bOk = true ;
   // recupero il riferimento locale
    Frame3d frLoc ;
-   bOk = bOk && pGeomDB->GetGroupGlobFrame( nParentId, frLoc) ;
+   bool bOk = pGeomDB->GetGroupGlobFrame( nParentId, frLoc) ;
   // porto in locale i punti, il versore iniziale, quello normale e il versore estrusione
    Point3d ptStartL = GetPointLocal( pGeomDB, ptStart, nRefType, frLoc) ;
    Point3d ptEndL = GetPointLocal( pGeomDB, ptEnd, nRefType, frLoc) ;
    Vector3d vtDirSL = GetVectorLocal( pGeomDB, FromPolar( 1, dDirSDeg), nRefType, frLoc) ;
    Vector3d vtNormL = GetVectorLocal( pGeomDB, Z_AX, nRefType, frLoc) ;
    Vector3d vtExtrL = GetVectorLocal( pGeomDB, Z_AX, nRefType, frLoc) ;
-  // setto l'arco
-   pCrv.Set( GetArc2PVN( ptStartL, ptEndL, vtDirSL, vtNormL)) ;
+  // creo l'arco (in casi particolari retta)
+   PtrOwner<ICurve> pCrv( bOk ? GetArc2PVN( ptStartL, ptEndL, vtDirSL, vtNormL) : nullptr) ;
    bOk = bOk && ! IsNull( pCrv) ;
   // assegno il versore estrusione
    bOk = bOk && pCrv->SetExtrusion( vtExtrL) ;
diff --git a/EgtExecutor.rc b/EgtExecutor.rc
index a403e49..206a4be 100644
Binary files a/EgtExecutor.rc and b/EgtExecutor.rc differ
diff --git a/LUA_GdbCreateCurve.cpp b/LUA_GdbCreateCurve.cpp
index 1550fdd..ec4b9bd 100644
--- a/LUA_GdbCreateCurve.cpp
+++ b/LUA_GdbCreateCurve.cpp
@@ -425,6 +425,32 @@ LuaCreateArc3P( lua_State* L)
    return 1 ;
 }
 
+//-------------------------------------------------------------------------------
+static int
+LuaCreateArc2PB( lua_State* L)
+{
+  // 4 o 5 parametri : ParentId, PtStart, PtEnd, dBulge [, nRefType]
+   int nParentId ;
+   LuaCheckParam( L, 1, nParentId)
+   Point3d ptStart ;
+   LuaCheckParam( L, 2, ptStart)
+   Point3d ptEnd ;
+   LuaCheckParam( L, 3, ptEnd)
+   double dBulge ;
+   LuaCheckParam( L, 4, dBulge)
+   int nRefType = RTY_DEFAULT ;
+   LuaGetParam( L, 5, nRefType) ;
+   LuaClearStack( L) ;
+  // creo l'arco
+   int nId = ExeCreateArc2PB( nParentId, ptStart, ptEnd, dBulge, nRefType) ;
+  // restituisco il risultato
+   if ( nId != GDB_ID_NULL)
+      LuaSetParam( L, nId) ;
+   else
+      LuaSetParam( L) ;
+   return 1 ;
+}
+
 //-------------------------------------------------------------------------------
 static int
 LuaCreateArc2PD( lua_State* L)
@@ -1057,6 +1083,7 @@ LuaInstallGdbCreateCurve( LuaMgr& luaMgr)
    bOk = bOk && luaMgr.RegisterFunction( "EgtArcC2P", LuaCreateArcC2P) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtArcC2PEx", LuaCreateArcC2PEx) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtArc3P", LuaCreateArc3P) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtArc2PB", LuaCreateArc2PB) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtArc2PD", LuaCreateArc2PD) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtArc2PDEx", LuaCreateArc2PDEx) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtArc2PV", LuaCreateArc2PV) ;