diff --git a/rtengine/curves.cc b/rtengine/curves.cc
index 776fec167..74800b530 100644
--- a/rtengine/curves.cc
+++ b/rtengine/curves.cc
@@ -1555,10 +1555,12 @@ void LocHHCurve::Set(const Curve &pCurve)
 
 void LocHHCurve::Set(const std::vector<double> &curvePoints, bool &HHutili)
 {
-    if (HHutili && !curvePoints.empty() && curvePoints[0] > FCT_Linear && curvePoints[0] < FCT_Unchanged) {
+  //  if (HHutili && !curvePoints.empty() && curvePoints[0] > FCT_Linear && curvePoints[0] < FCT_Unchanged) {
+    if (!curvePoints.empty() && curvePoints[0] > FCT_Linear && curvePoints[0] < FCT_Unchanged) {
         FlatCurve ttcurve(curvePoints, false, CURVES_MIN_POLY_POINTS / 2);
         ttcurve.setIdentityValue(0.);
         Set(ttcurve);
+		HHutili = true;
     } else {
         Reset();
     }
@@ -1602,10 +1604,12 @@ void LocLHCurve::Set(const Curve &pCurve)
 void LocLHCurve::Set(const std::vector<double> &curvePoints, bool &LHutili)
 {
 
-    if (LHutili && !curvePoints.empty() && curvePoints[0] > FCT_Linear && curvePoints[0] < FCT_Unchanged) {
+    if (!curvePoints.empty() && curvePoints[0] > FCT_Linear && curvePoints[0] < FCT_Unchanged) {
+//    if (LHutili && !curvePoints.empty() && curvePoints[0] > FCT_Linear && curvePoints[0] < FCT_Unchanged) {
         FlatCurve tcurve(curvePoints, false, CURVES_MIN_POLY_POINTS / 2);
         tcurve.setIdentityValue(0.);
         Set(tcurve);
+		LHutili = true;
     } else {
         Reset();
     }
diff --git a/rtengine/improccoordinator.cc b/rtengine/improccoordinator.cc
index 556de7b96..74c5077f8 100644
--- a/rtengine/improccoordinator.cc
+++ b/rtengine/improccoordinator.cc
@@ -1700,6 +1700,12 @@ void ImProcCoordinator::updatePreviewImage(int todo, Crop* cropCall)
                 }
 
                 locallutili = false;
+				localexutili = false;
+                localcutili = false;
+                localskutili = false;
+
+                LHutili = false;
+                HHutili = false;
 
             }
             //******************************************************************
@@ -2651,24 +2657,24 @@ void ImProcCoordinator::updatePreviewImage(int todo, Crop* cropCall)
                 std::string t_curvhhref = "1000A0B500C350D350E166F500G350H350I333J500K350L350M500N500O350P350Q666R500S350T350U833V500W350X350Y@";
 
                 if (lhstr[sp].c_str() != t_curvhhref) {
-                    LHutili = true;
+                    //LHutili = true;
                 }
 
                 if (hhstr[sp].c_str() != t_curvhhref) {
-                    HHutili = true;
+                  //  HHutili = true;
                 }
 
                 std::string t_curvskinref = "3000A0B0C1000D1000E@";
                 std::string t_none = "0A@";
 
                 if (skinstr[sp].c_str() != t_curvskinref  && skinstr[sp].c_str() != t_none) {
-                    localskutili = true;
+                 //   localskutili = true;
                 }
 
                 std::string t_curvexref = "3000A0B0C1000D1000E@";
 
                 if (exstr[sp].c_str() != t_curvexref  && exstr[sp].c_str() != t_none) {
-                    localexutili = true;
+                  //  localexutili = true;
                 }
 
                 params.locallab.getCurves(locRETgainCurve, locRETgainCurverab, loclhCurve, lochhCurve, LHutili, HHutili);
@@ -2746,6 +2752,14 @@ void ImProcCoordinator::updatePreviewImage(int todo, Crop* cropCall)
             params.locallab.lumaref = INFINITY;
             params.locallab.sobelref = INFINITY;
             locallutili = false;
+            localexutili = false;
+              //  locallutili = false;
+                localcutili = false;
+                localskutili = false;
+             //   localexutili = false;
+
+                LHutili = false;
+                HHutili = false;
 
             sps[sp] = sp;
             dataspot[2][sp] = circrads[sp] = params.locallab.circrad = dataspot[2][0];
@@ -3316,11 +3330,11 @@ void ImProcCoordinator::updatePreviewImage(int todo, Crop* cropCall)
             std::string t_curvhhref2 = "1000A0B500C350D350E166F500G350H350I333J500K350L350M500N500O350P350Q666R500S350T350U833V500W350X350Y@";
 
             if (hhstr[sp].c_str() != t_curvhhref2) {
-                HHutili = true;
+              //  HHutili = true;
             }
 
             if (lhstr[sp].c_str() != t_curvhhref2) {
-                LHutili = true;
+             //   LHutili = true;
             }
 
             params.locallab.getCurves(locRETgainCurve, locRETgainCurverab, loclhCurve, lochhCurve, LHutili, HHutili);
@@ -3339,7 +3353,7 @@ void ImProcCoordinator::updatePreviewImage(int todo, Crop* cropCall)
             std::string t_curvexref2 = "3000A0B0C1000D1000E@";
 
             if (exstr[sp].c_str() != t_curvexref2 && exstr[sp].c_str() != t_none2) {
-                localexutili = true;
+              //  localexutili = true;
             }
 
             double br = 0.;
diff --git a/rtengine/simpleprocess.cc b/rtengine/simpleprocess.cc
index ed56b3989..d9538fe42 100644
--- a/rtengine/simpleprocess.cc
+++ b/rtengine/simpleprocess.cc
@@ -2119,11 +2119,11 @@ private:
                     std::string t_curvhhref = "1000A0B500C350D350E166F500G350H350I333J500K350L350M500N500O350P350Q666R500S350T350U833V500W350X350Y@";
 
                     if (lhstrs[sp].c_str() != t_curvhhref) {
-                        LHutili = true;
+                      //  LHutili = true;
                     }
 
                     if (hhstrs[sp].c_str() != t_curvhhref) {
-                        HHutili = true;
+                    //    HHutili = true;
                     }
 
 
@@ -2136,13 +2136,13 @@ private:
                     std::string t_none = "0A@";
 
                     if (skinstrs[sp].c_str() != t_curvskinref  && skinstrs[sp].c_str() != t_none) {
-                        localskutili = true;
+                      //  localskutili = true;
                     }
 
                     std::string t_curvexref = "3000A0B0C1000D1000E@";
 
                     if (exstrs[sp].c_str() != t_curvexref  && exstrs[sp].c_str() != t_none) {
-                        localexutili = true;
+                     //   localexutili = true;
                     }
 
                     CurveFactory::curveLocal(locallutili, params.locallab.llcurve, lllocalcurve, 1);