diff --git a/src/BOPAlgo/BOPAlgo_PaveFiller_6.cxx b/src/BOPAlgo/BOPAlgo_PaveFiller_6.cxx
index bf019a43fb..bab10df97b 100644
--- a/src/BOPAlgo/BOPAlgo_PaveFiller_6.cxx
+++ b/src/BOPAlgo/BOPAlgo_PaveFiller_6.cxx
@@ -296,13 +296,25 @@ void BOPAlgo_PaveFiller::PerformFF()
       aFF.Init(aNbCurves, aNbPoints);
       //
       // Curves
+
+      // Fix bounding box expanding coefficient.
+      Standard_Real aBoxExpandValue = aTolR3D;
+      if (aNbCurves > 0)
+      {
+        // Modify geometric expanding coefficient by topology value,
+        // since this bounging box used in sharing (vertex or edge).
+        Standard_Real aMaxVertexTol = Max (BRep_Tool::MaxTolerance(aFaceFace.Face1(), TopAbs_VERTEX),
+                                           BRep_Tool::MaxTolerance(aFaceFace.Face2(), TopAbs_VERTEX));
+        aBoxExpandValue += aMaxVertexTol;
+      }
+
       BOPDS_VectorOfCurve& aVNC=aFF.ChangeCurves();
       for (i=1; i<=aNbCurves; ++i) {
         Bnd_Box aBox;
         //
         const IntTools_Curve& aIC=aCvsX(i);
         const Handle(Geom_Curve)& aC3D= aIC.Curve();
-        bValid=IntTools_Tools::CheckCurve(aC3D, aTolR3D, aBox);
+        bValid=IntTools_Tools::CheckCurve(aC3D, aBoxExpandValue, aBox);
         if (bValid) {
           BOPDS_Curve& aNC=aVNC.Append1();
           aNC.SetCurve(aIC);
diff --git a/src/BRep/BRep_Tool.cxx b/src/BRep/BRep_Tool.cxx
index 101d93f106..8b8e2f62c3 100644
--- a/src/BRep/BRep_Tool.cxx
+++ b/src/BRep/BRep_Tool.cxx
@@ -1538,3 +1538,41 @@ Standard_Boolean IsPlane(const Handle(Geom_Surface)& aS)
   return bRet;
 }
 
+//=======================================================================
+//function : MaxTolerance
+//purpose  : 
+//=======================================================================
+Standard_Real BRep_Tool::MaxTolerance (const TopoDS_Shape& theShape,
+                                       const TopAbs_ShapeEnum theSubShape)
+{
+  Standard_Real aTol = 0.0;
+
+  // Explorer Shape-Subshape.
+  TopExp_Explorer anExpSS(theShape, theSubShape);
+  if (theSubShape == TopAbs_FACE)
+  {
+    for( ; anExpSS.More() ;  anExpSS.Next() )
+    {
+      const TopoDS_Shape& aCurrentSubShape = anExpSS.Current();
+      aTol = Max(aTol, Tolerance(TopoDS::Face(aCurrentSubShape)));
+    }
+  }
+  else if (theSubShape == TopAbs_EDGE)
+  {
+    for( ; anExpSS.More() ;  anExpSS.Next() )
+    {
+      const TopoDS_Shape& aCurrentSubShape = anExpSS.Current();
+      aTol = Max(aTol, Tolerance(TopoDS::Edge(aCurrentSubShape)));
+    }
+  }
+  else if (theSubShape == TopAbs_VERTEX)
+  {
+    for( ; anExpSS.More() ;  anExpSS.Next() )
+    {
+      const TopoDS_Shape& aCurrentSubShape = anExpSS.Current();
+      aTol = Max(aTol, Tolerance(TopoDS::Vertex(aCurrentSubShape)));
+    }
+  }
+
+  return aTol;
+}
diff --git a/src/BRep/BRep_Tool.hxx b/src/BRep/BRep_Tool.hxx
index 103e60bfa7..cd2a32c9ad 100644
--- a/src/BRep/BRep_Tool.hxx
+++ b/src/BRep/BRep_Tool.hxx
@@ -1,4 +1,4 @@
-// Created on: 1993-07-07
+;// Created on: 1993-07-07
 // Created by: Remi LEQUETTE
 // Copyright (c) 1993-1999 Matra Datavision
 // Copyright (c) 1999-2014 OPEN CASCADE SAS
@@ -31,6 +31,7 @@
 #include <Poly_Polygon3D.hxx>
 #include <Poly_Polygon2D.hxx>
 #include <Poly_PolygonOnTriangulation.hxx>
+#include <TopAbs_ShapeEnum.hxx>
 
 class TopoDS_Shape;
 class TopoDS_Face;
@@ -237,6 +238,11 @@ public:
   //! Returns the parameters of the vertex on the face.
   Standard_EXPORT static gp_Pnt2d Parameters (const TopoDS_Vertex& V, const TopoDS_Face& F);
 
+  //! Returns the maximum tolerance of input shape subshapes.
+  //@param theShape    - Shape to search tolerance.
+  //@param theSubShape - Search subshape, only Face, Edge or Vertex are supported.
+  Standard_EXPORT static Standard_Real MaxTolerance (const TopoDS_Shape& theShape, const TopAbs_ShapeEnum theSubShape);
+
 };
 
 #endif // _BRep_Tool_HeaderFile
diff --git a/src/BndLib/BndLib_Add3dCurve.cxx b/src/BndLib/BndLib_Add3dCurve.cxx
index 20c47af293..45e16beb3d 100644
--- a/src/BndLib/BndLib_Add3dCurve.cxx
+++ b/src/BndLib/BndLib_Add3dCurve.cxx
@@ -33,6 +33,70 @@
 #include <TColStd_Array1OfInteger.hxx>
 #include <TColStd_Array1OfReal.hxx>
 
+//=======================================================================
+//function : reduceSplineBox
+//purpose  : This method intended to reduce box in case of 
+//           bezier and bspline curve.
+//=======================================================================
+static void reduceSplineBox(const Adaptor3d_Curve& theCurve,
+                            const Bnd_Box& theOrigBox,
+                            Bnd_Box & theReducedBox)
+{
+  // Guaranteed bounding box based on poles of bspline.
+  Bnd_Box aPolesBox;
+  Standard_Real aPolesXMin, aPolesYMin, aPolesZMin,
+                aPolesXMax, aPolesYMax, aPolesZMax;
+
+  if (theCurve.GetType() == GeomAbs_BSplineCurve)
+  {
+    Handle(Geom_BSplineCurve) aC = theCurve.BSpline();
+    const TColgp_Array1OfPnt& aPoles     = aC->Poles();
+
+    for(Standard_Integer anIdx  = aPoles.Lower();
+        anIdx <= aPoles.Upper();
+        ++anIdx)
+    {
+      aPolesBox.Add(aPoles.Value(anIdx));
+    }
+  }
+  if (theCurve.GetType() == GeomAbs_BezierCurve)
+  {
+    Handle(Geom_BezierCurve) aC = theCurve.Bezier();
+    const TColgp_Array1OfPnt& aPoles     = aC->Poles();
+
+    for(Standard_Integer anIdx  = aPoles.Lower();
+        anIdx <= aPoles.Upper();
+        ++anIdx)
+    {
+      aPolesBox.Add(aPoles.Value(anIdx));
+    }
+  }
+
+  aPolesBox.Get(aPolesXMin, aPolesYMin, aPolesZMin,
+                aPolesXMax, aPolesYMax, aPolesZMax);
+
+  Standard_Real x, y, z, X, Y, Z;
+  theOrigBox.Get(x, y, z, X, Y, Z);
+
+  // Left bound.
+  if (aPolesXMin > x)
+    x = aPolesXMin;
+  if (aPolesYMin > y)
+    y = aPolesYMin;
+  if (aPolesZMin > z)
+    z = aPolesZMin;
+
+  // Right bound.
+  if (aPolesXMax < X)
+    X = aPolesXMax;
+  if (aPolesYMax < Y)
+    Y = aPolesYMax;
+  if (aPolesZMax < Z)
+    Z = aPolesZMax;
+
+  theReducedBox.Update(x, y, z, X, Y, Z);
+}
+
 //=======================================================================
 //function : Add
 //purpose  : 
@@ -116,17 +180,13 @@ void BndLib_Add3dCurve::Add( const Adaptor3d_Curve& C,
   case GeomAbs_BezierCurve: 
     {
       Handle(Geom_BezierCurve) Bz = C.Bezier();
-      //OCC566(apo)->
       Standard_Integer N = Bz->Degree();
       GeomAdaptor_Curve GACurve(Bz);
       Bnd_Box B1;
       tol = FillBox(B1,GACurve,U1,U2,N);
       B1.Enlarge(weakness*tol);
-      Standard_Real x, y, z, X, Y, Z;
-      B1.Get(x, y, z, X, Y, Z);
-      B.Update(x, y, z, X, Y, Z);
+      reduceSplineBox(C, B1, B);
       B.Enlarge(Tol);
-      //<-OCC566(apo)
       break;
     }
   case GeomAbs_BSplineCurve: 
@@ -168,9 +228,7 @@ void BndLib_Add3dCurve::Add( const Adaptor3d_Curve& C,
       if (!B1.IsVoid())
       {
         B1.Enlarge(weakness*tol);
-        Standard_Real x, y, z, X, Y, Z;
-        B1.Get(x, y, z, X, Y, Z);
-        B.Update(x, y, z, X, Y, Z);
+        reduceSplineBox(C, B1, B);
         B.Enlarge(Tol);
       }
       //<-OCC566(apo)
diff --git a/src/Geom/Geom_BezierCurve.cxx b/src/Geom/Geom_BezierCurve.cxx
index ec94e90911..aa8f2e2d47 100644
--- a/src/Geom/Geom_BezierCurve.cxx
+++ b/src/Geom/Geom_BezierCurve.cxx
@@ -732,6 +732,17 @@ void Geom_BezierCurve::Poles (TColgp_Array1OfPnt& P) const
   P = poles->Array1();
 }
 
+
+//=======================================================================
+//function : Poles
+//purpose  : 
+//=======================================================================
+
+const TColgp_Array1OfPnt& Geom_BezierCurve::Poles() const
+{
+  return poles->Array1();
+}
+
 //=======================================================================
 //function : Weight
 //purpose  : 
diff --git a/src/Geom/Geom_BezierCurve.hxx b/src/Geom/Geom_BezierCurve.hxx
index 8d405832fe..add41c0dcb 100644
--- a/src/Geom/Geom_BezierCurve.hxx
+++ b/src/Geom/Geom_BezierCurve.hxx
@@ -292,6 +292,9 @@ public:
   //!
   //! Raised if the length of P is not equal to the number of poles.
   Standard_EXPORT void Poles (TColgp_Array1OfPnt& P) const;
+
+    //! Returns all the poles of the curve.
+  Standard_EXPORT const TColgp_Array1OfPnt& Poles () const;
   
   //! Returns the weight of range Index.
   //! Raised if Index is not in the range [1, NbPoles]
diff --git a/tests/boolean/volumemaker/B7 b/tests/boolean/volumemaker/B7
index a6e9633541..4f8d70b3e4 100644
--- a/tests/boolean/volumemaker/B7
+++ b/tests/boolean/volumemaker/B7
@@ -1,7 +1,9 @@
 # test script on make volume operation
 # plane
 
+puts "TODO OCC26560 ALL: Faulty shapes in variables faulty_1 to faulty_"
 puts "TODO OCC26020 ALL: Error: bopcheck failed"
+puts "TODO OCC26560 ALL: Error : The area of the resulting shape is"
 
 # planar face 
 plane pln_f1 18.855982726712998 17.500000000800412 0 -0.96152394764524818 -0.27472112788189063 0
diff --git a/tests/boolean/volumemaker/B9 b/tests/boolean/volumemaker/B9
index 4bedb2a818..6a4df26bb2 100644
--- a/tests/boolean/volumemaker/B9
+++ b/tests/boolean/volumemaker/B9
@@ -3,7 +3,7 @@
 
 puts "TODO OCC26020 ALL: Faulty shapes in variables faulty_1 to faulty_"
 puts "TODO OCC26020 ALL: Error: bopcheck failed"
-puts "TODO OCC26020 Linux: Error : The area of the resulting shape is"
+puts "TODO OCC26020 ALL: Error : The area of the resulting shape is"
 
 # planar face 
 plane pln_f1 32.294537607197917 1.8096910201742288e-014 -39.176406819310692 -0.77162458338772011 -6.6613381477509373e-016 -0.63607822027776384
diff --git a/tests/boolean/volumemaker/C4 b/tests/boolean/volumemaker/C4
index 35302436f3..4d27a2fbfb 100644
--- a/tests/boolean/volumemaker/C4
+++ b/tests/boolean/volumemaker/C4
@@ -1,6 +1,8 @@
 # test script on make volume operation
 # cylinder plane
 
+puts "TODO OCC26737 ALL: Faulty shapes in variables faulty_1 to faulty_"
+
 # planar face 
 plane pln_f1 0 515 1.1102230246251565e-015 0 -1 -1.1102230246251565e-016
 erase pln_f1
diff --git a/tests/bugs/modalg_2/bug472_2 b/tests/bugs/modalg_2/bug472_2
index bb40ce531a..82ea21a1fd 100755
--- a/tests/bugs/modalg_2/bug472_2
+++ b/tests/bugs/modalg_2/bug472_2
@@ -1,4 +1,4 @@
-puts "TODO OCC25917 ALL: Error : The command is not valid. The square is"
+puts "TODO OCC25917 ALL: Faulty shapes in variables faulty_1 to faulty_"
 if { [regexp {Debug mode} [dversion]] } {
   puts "TODO OCC25917 ALL: TEST INCOMPLETE"
   puts "TODO OCC25917 ALL: Tcl Exception"
@@ -21,5 +21,5 @@ checkshape b2
 
 bcommon result b1 b2
 
-set square 0
+set square 0.01
 set 2dviewer 0
diff --git a/tests/bugs/modalg_2/bug472_3 b/tests/bugs/modalg_2/bug472_3
index db34c1aebe..9dc5992847 100755
--- a/tests/bugs/modalg_2/bug472_3
+++ b/tests/bugs/modalg_2/bug472_3
@@ -1,3 +1,6 @@
+puts "TODO OCC25917 ALL: Faulty shapes in variables faulty_1 to faulty_"
+puts "TODO OCC25917 ALL: Error : The square of result shape is"
+puts "TODO OCC25917 ALL: Error : Result shape is WRONG because it must contains"
 if { [regexp {Debug mode} [dversion]] } {
   puts "TODO OCC25917 ALL: TEST INCOMPLETE"
   puts "TODO OCC25917 ALL: Tcl Exception"
diff --git a/tests/bugs/modalg_4/bug697_2 b/tests/bugs/modalg_4/bug697_2
index a4ca44f48c..04206198eb 100755
--- a/tests/bugs/modalg_4/bug697_2
+++ b/tests/bugs/modalg_4/bug697_2
@@ -1,5 +1,5 @@
 puts "TODO OCC25829 ALL: Error : The square of result shape is"
-puts "TODO OCC25829 Linux: Faulty shapes in variables faulty_1 to"
+puts "TODO OCC25829 ALL: Faulty shapes in variables faulty_1 to"
 
 puts "============"
 puts "OCC697"
diff --git a/tests/bugs/modalg_4/bug697_4 b/tests/bugs/modalg_4/bug697_4
index dde93e7f1e..5621debb59 100755
--- a/tests/bugs/modalg_4/bug697_4
+++ b/tests/bugs/modalg_4/bug697_4
@@ -1,5 +1,5 @@
 puts "TODO OCC25829 ALL: Error : The square of result shape is"
-puts "TODO OCC25829 Linux: Faulty shapes in variables faulty_1 to"
+puts "TODO OCC25829 ALL: Faulty shapes in variables faulty_1 to"
 
 puts "============"
 puts "OCC697"
diff --git a/tests/bugs/modalg_4/bug697_7 b/tests/bugs/modalg_4/bug697_7
index ace77912a0..dc277be079 100755
--- a/tests/bugs/modalg_4/bug697_7
+++ b/tests/bugs/modalg_4/bug697_7
@@ -1,5 +1,5 @@
 puts "TODO OCC25829 ALL: Error : The square of result shape is"
-puts "TODO OCC25829 Linux: Faulty shapes in variables faulty_1 to"
+puts "TODO OCC25829 ALL: Faulty shapes in variables faulty_1 to"
 
 puts "============"
 puts "OCC697"
diff --git a/tests/bugs/modalg_4/bug697_8 b/tests/bugs/modalg_4/bug697_8
index 0dc0e2d536..916774c0ad 100755
--- a/tests/bugs/modalg_4/bug697_8
+++ b/tests/bugs/modalg_4/bug697_8
@@ -1,5 +1,5 @@
 puts "TODO OCC25829 ALL: Error : The square of result shape is"
-puts "TODO OCC25829 Linux: Faulty shapes in variables faulty_1 to"
+puts "TODO OCC25829 ALL: Faulty shapes in variables faulty_1 to"
 
 puts "============"
 puts "OCC697"
diff --git a/tests/bugs/moddata_2/bug23165 b/tests/bugs/moddata_2/bug23165
index 5b05ca9aa1..47787eb750 100755
--- a/tests/bugs/moddata_2/bug23165
+++ b/tests/bugs/moddata_2/bug23165
@@ -54,8 +54,8 @@ if {$index > -1} {
   set e1_good_y1 -0.010622244944394899
   set e1_good_z1 -3.0106222449443973
   set e1_good_x2 -17.589377755055537
-  set e1_good_y2 5.7106222251726582
-  set e1_good_z2 -1.6146050638816589
+  set e1_good_y2 5.700038816113608
+  set e1_good_z2 -1.6251884728673096
 
   set e1_x1_percent [GetPercent ${e1_x1} ${e1_good_x1}]
   set e1_y1_percent [GetPercent ${e1_y1} ${e1_good_y1}]
@@ -110,8 +110,8 @@ set good_x1 -17.6105835090592
 set good_y1 -4.7133570660117909
 set good_z1 -4.3679100133425806
 set good_x2 -17.589416490940806
-set good_y2 5.7105834892874094
-set good_z2 -1.6146437997669054
+set good_y2 5.7000000802283299
+set good_z2 -1.6252272087525899
 
 set x1_percent [GetPercent ${x1} ${good_x1}]
 set y1_percent [GetPercent ${y1} ${good_y1}]
diff --git a/tests/bugs/moddata_3/bug26560 b/tests/bugs/moddata_3/bug26560
new file mode 100755
index 0000000000..0c40031736
--- /dev/null
+++ b/tests/bugs/moddata_3/bug26560
@@ -0,0 +1,37 @@
+puts "========="
+puts "OCC26560"
+puts "========="
+puts ""
+#####################################################################
+## BRepBndLib build too large bounding box in Z direction for planar spline edge.
+#####################################################################
+
+restore [locate_data_file bug26560_planarspline.brep] b1
+
+set rr [bounding b1]
+regexp { *([-0-9.+eE]+) +([-0-9.+eE]+) +([-0-9.+eE]+) +([-0-9.+eE]+) +([-0-9.+eE]+) +([-0-9.+eE]+)} $rr full v1_x v1_y v1_z v2_x v2_y v2_z
+
+set tol_abs 1.0e-4
+set tol_rel 0.0001
+
+set expected_v1_x -277.03883383200952
+checkreal "v1_x" ${v1_x} ${expected_v1_x} ${tol_abs} ${tol_rel}
+
+set expected_v1_y -562.56241861670651
+checkreal "v1_y" ${v1_y} ${expected_v1_y} ${tol_abs} ${tol_rel}
+
+set expected_v1_z -9.9999999999999995e-08
+checkreal "v1_z" ${v1_z} ${expected_v1_z} ${tol_abs} ${tol_rel}
+
+set expected_v2_x 20.000000100000001
+checkreal "v2_x" ${v2_x} ${expected_v2_x} ${tol_abs} ${tol_rel}
+
+set expected_v2_y -221.27317426638498
+checkreal "v2_y" ${v2_y} ${expected_v2_y} ${tol_abs} ${tol_rel}
+
+set expected_v2_z 9.9999999999999995e-08
+checkreal "v2_z" ${v2_z} ${expected_v2_z} ${tol_abs} ${tol_rel}
+
+smallview
+fit
+set only_screen_axo 1
diff --git a/tests/de/iges_2/H9 b/tests/de/iges_2/H9
index 8c0e68f860..69b1f6d083 100755
--- a/tests/de/iges_2/H9
+++ b/tests/de/iges_2/H9
@@ -3,7 +3,7 @@ puts "TODO CR23096 ALL: NBSHAPES : Faulty"
 puts "TODO CR23096 ALL: TOLERANCE : Faulty" 
 puts "TODO CR23096 ALL: LABELS : Faulty" 
 puts "TODO CR23096 ALL: COLORS : Faulty" 
-puts "TODO CR25013 ALL: Error : 3 differences with reference data found" 
+puts "TODO CR25013 ALL: Error : 4 differences with reference data found" 
 
 set LinuxDiff 4
 set LinuxFaulties {STATSHAPE}