diff --git a/hydrall/hydrall.h b/hydrall/hydrall.h
index f2dac0cb..d88b8dc4 100644
--- a/hydrall/hydrall.h
+++ b/hydrall/hydrall.h
@@ -72,7 +72,7 @@
 
     };
 
-    struct Tsoil {
+    struct ThydrallSoil {
 
         int soilLayersNr;
         double soilTotalDepth;
@@ -149,7 +149,7 @@
         TenvironmentalVariable environmentalVariable;
         TparameterWangLeuning parameterWangLeuning;
         Tplant plant;
-        Tsoil soil;
+        ThydrallSoil soil;
         TlightExtinctionCoefficient directLightExtinctionCoefficient;
         TlightExtinctionCoefficient diffuseLightExtinctionCoefficient;
 
diff --git a/interpolation/interpolation.cpp b/interpolation/interpolation.cpp
index d12c4f13..39be0479 100644
--- a/interpolation/interpolation.cpp
+++ b/interpolation/interpolation.cpp
@@ -882,9 +882,11 @@ float shepardSearchNeighbour(vector <Crit3DInterpolationDataPoint> &inputPoints,
     }
 
     float radius;
+
     if (shepardNeighbourPoints.size() < SHEPARD_MIN_NRPOINTS)
     {
         int nrPoints = sortPointsByDistance(SHEPARD_MIN_NRPOINTS, inputPoints, outputPoints);
+        if (outputPoints.empty()) return NODATA;
         radius = outputPoints[nrPoints-1].distance + float(EPSILON);
     }
     else if (shepardNeighbourPoints.size() > SHEPARD_MAX_NRPOINTS)
@@ -990,6 +992,9 @@ float modifiedShepardIdw(vector <Crit3DInterpolationDataPoint> &myPoints,
     else
         validPoints = myPoints;
 
+    if (myPoints.empty())
+        return NODATA;
+
     weight.resize(validPoints.size());
     t.resize(validPoints.size());
     S.resize(validPoints.size());
diff --git a/mathFunctions/physics.cpp b/mathFunctions/physics.cpp
index 9f54636b..03567b53 100644
--- a/mathFunctions/physics.cpp
+++ b/mathFunctions/physics.cpp
@@ -48,7 +48,7 @@ double pressureFromAltitude(double height)
 
 double pressureFromAltitude(double temperature, double height)
 {
-    return P0 * exp((- GRAVITY * M_AIR * height) / (R_GAS * temperature));
+    return P0 * exp((- GRAVITY * M_AIR * height) / (R_GAS * (temperature + 273.15)));
 }
 
 /*!
diff --git a/project/project.cpp b/project/project.cpp
index 74618041..f2f8a1be 100644
--- a/project/project.cpp
+++ b/project/project.cpp
@@ -3052,6 +3052,8 @@ bool Project::interpolationDemGlocalDetrending(meteoVariable myVar, const Crit3D
                             else
                                 myRaster->value[row][col] += interpolatedValue*areaCells[cellIndex+1];
                         }
+                        else
+                            return false;
                     }
                 }
             }
@@ -3459,8 +3461,13 @@ bool Project::interpolationGrid(meteoVariable myVar, const Crit3DTime& myTime)
                                     proxyIndex++;
                                 }
                             }
-                            interpolatedValue = interpolate(subsetInterpolationPoints, &interpolationSettings, meteoSettings, myVar, myX, myY, myZ, proxyValues, true)
+
+                            double temp = interpolate(subsetInterpolationPoints, &interpolationSettings, meteoSettings, myVar, myX, myY, myZ, proxyValues, true);
+                            if (! isEqual(temp, NODATA))
+                                interpolatedValue = interpolate(subsetInterpolationPoints, &interpolationSettings, meteoSettings, myVar, myX, myY, myZ, proxyValues, true)
                                                 * areaCells[cellIndex + 1];
+                            else
+                                return false;
                         }
                         if (freq == hourly)
                         {
diff --git a/proxyWidget/proxyWidget.cpp b/proxyWidget/proxyWidget.cpp
index 53f4a917..18f77b9e 100644
--- a/proxyWidget/proxyWidget.cpp
+++ b/proxyWidget/proxyWidget.cpp
@@ -98,6 +98,8 @@ Crit3DProxyWidget::Crit3DProxyWidget(Crit3DInterpolationSettings* interpolationS
     selectionOptionBoxLayout->addWidget(&modelLR);
     selectionOptionBoxLayout->addWidget(&climatologicalLR);
 
+    if (macroAreaNumber != NODATA) modelLR.setEnabled(false);
+
     selectionOptionEditLayout->addWidget(r2Label);
     selectionOptionEditLayout->addWidget(&r2);
     selectionOptionEditLayout->addStretch(150);
@@ -585,7 +587,6 @@ void Crit3DProxyWidget::addMacroAreaLR()
             point_vector.append(point);
         }
 
-        macroAreaNumber = NODATA;
         chartView->drawModelLapseRate(point_vector);
     }
     return;