diff --git a/PVPlantTerrainAnalisys.py b/PVPlantTerrainAnalisys.py
index a8d706f..5a9457f 100644
--- a/PVPlantTerrainAnalisys.py
+++ b/PVPlantTerrainAnalisys.py
@@ -450,35 +450,18 @@ class ContourTaskPanel():
         starttime = datetime.now()
 
         if self.land is None:
-            print("No hay objetos para procesar")
+            FreeCAD.Console.PrintWarning("No hay objetos para procesar\n")
             return False
         else:
             minor = FreeCAD.Units.Quantity(self.inputMinorContourMargin.currentText()).Value
             mayor = FreeCAD.Units.Quantity(self.inputMayorContourMargin.currentText()).Value
 
-            i = 2
-            if i == 0:
-                makeContours(self.land, minor, mayor, self.MinorColor, self.MayorColor,
-                          self.inputMinorContourThickness.value(), self.inputMayorContourThickness.value())
-            elif i == 1:
-                import multiprocessing
-                p = multiprocessing.Process(target=makeContours,
-                                            args=(self.land, minor, mayor,
-                                                  self.MinorColor, self.MayorColor,
-                                                  self.inputMinorContourThickness.value(),
-                                                  self.inputMayorContourThickness.value(), ))
-                p.start()
-                p.join()
-
-            else:
-                import threading
-                hilo = threading.Thread(target = makeContours,
-                                        args = (self.land, minor, mayor,
-                                                self.MinorColor, self.MayorColor,
-                                                self.inputMinorContourThickness.value(),
-                                                self.inputMayorContourThickness.value()))
-                hilo.daemon = True
-                hilo.start()
+            makeContours(
+                self.land, minor, mayor,
+                self.MinorColor, self.MayorColor,
+                self.inputMinorContourThickness.value(),
+                self.inputMayorContourThickness.value()
+            )
 
         total_time = datetime.now() - starttime
         print(" -- Tiempo tardado:", total_time)
@@ -569,7 +552,7 @@ class SlopeTaskPanel(_generalTaskPanel):
             land.ViewObject.DiffuseColor = colorlist
 
         # TODO: check this code:
-        elif obj.isDerivedFrom("Mesh::Feature"):
+        elif hasattr(land, 'Mesh') and land.isDerivedFrom("Mesh::Feature"):
             fMesh = Mest2FemMesh(land)
             import math
             setColors = []
@@ -602,10 +585,7 @@ class SlopeTaskPanel(_generalTaskPanel):
         print("Everything OK (", datetime.now() - starttime, ")")
 
     def accept(self):
-        # self.getPointSlope()
-        import threading
-        hilo = threading.Thread(target=self.getPointSlope(self.ranges))
-        hilo.start()
+        self.getPointSlope(self.ranges)
         return True
 
 # Orientation Analisys: ---------------------------------------------------------------------------------
@@ -809,4 +789,4 @@ if FreeCAD.GuiUp:
     FreeCADGui.addCommand('SlopeAnalisys', _CommandSlopeAnalisys())
     FreeCADGui.addCommand('HeightAnalisys', _CommandHeightAnalisys())
     FreeCADGui.addCommand('OrientationAnalisys', _CommandOrientationAnalisys())
-    FreeCADGui.addCommand('TerrainAnalisys', CommandTerrainAnalisysGroup())'''
\ No newline at end of file
+    FreeCADGui.addCommand('TerrainAnalisys', CommandTerrainAnalisysGroup())'''