diff --git a/src/Mod/OpenSCAD/OpenSCAD2Dgeom.py b/src/Mod/OpenSCAD/OpenSCAD2Dgeom.py
index 546c8d7ac..6779259bf 100644
--- a/src/Mod/OpenSCAD/OpenSCAD2Dgeom.py
+++ b/src/Mod/OpenSCAD/OpenSCAD2Dgeom.py
@@ -59,6 +59,7 @@ class Overlappingfaces():
         return bigface.common(smallface).Area > 0
 
     def builddepdict(self):
+        import Part
         import itertools
         #isinsidelist = []
         self.isinsidedict = {}
@@ -67,7 +68,7 @@ class Overlappingfaces():
             try:
                 overlap = Overlappingfaces.dofacesoverlapboolean(\
                         self.sortedfaces[bigfacei],self.sortedfaces[smallfacei])
-            except:
+            except Part.OCCError:
                 overlap = Overlappingfaces.dofacesoverlapallverts(\
                         self.sortedfaces[bigfacei],self.sortedfaces[smallfacei])
             if overlap:
@@ -324,7 +325,7 @@ def edgestowires(edgelist,eps=0.001):
                 #if not close or wire.isClosed or outerd > 0.0001:
                 wirelist.append(Part.Wire(path))
                 done = True
-            except:
+            except Part.OCCError:
                 pass
             if not done:
                 comp=Part.Compound(path)
@@ -373,7 +374,7 @@ def edgestofaces(edges,algo=3,eps=0.001):
                 edges2.append(Part.Line(p1,p0).toShape())
                 w = Part.Wire(edges2)
                 #w = Part.Wire(fcgeo.sortEdges(edges2))
-            except:
+            except OCCError:
                 comp=Part.Compound(edges2)
                 w = comp.connectEdgesToWires(False,eps).Wires[0]
         facel.append(Part.Face(w))
diff --git a/src/Mod/OpenSCAD/OpenSCADFeatures.py b/src/Mod/OpenSCAD/OpenSCADFeatures.py
index b02d12fe2..667c598a9 100644
--- a/src/Mod/OpenSCAD/OpenSCADFeatures.py
+++ b/src/Mod/OpenSCAD/OpenSCADFeatures.py
@@ -57,13 +57,9 @@ class ViewProviderTree:
 
     def __setstate__(self,state):
         if state is not None:
-            try:
-                import FreeCAD
-                doc = FreeCAD.ActiveDocument #crap
-                self.Object = doc.getObject(state['ObjectName'])
-            except:
-                raise
-#        return None
+            import FreeCAD
+            doc = FreeCAD.ActiveDocument #crap
+            self.Object = doc.getObject(state['ObjectName'])
 
     def claimChildren(self):
         objs = []
@@ -448,7 +444,7 @@ class Twist:
                         solid.reverse()
                     assert(solid.Volume >= 0)
                     solids.append(solid)
-                except:
+                except Part.OCCError:
                     solids.append(Part.Compound(faces))
                 fp.Shape=Part.Compound(solids)
 
diff --git a/src/Mod/OpenSCAD/OpenSCADUtils.py b/src/Mod/OpenSCAD/OpenSCADUtils.py
index de0150892..4c3f58d8c 100644
--- a/src/Mod/OpenSCAD/OpenSCADUtils.py
+++ b/src/Mod/OpenSCAD/OpenSCADUtils.py
@@ -35,7 +35,13 @@ def translate(context,text):
     return QtGui.QApplication.translate(context, text, None, \
         QtGui.QApplication.UnicodeUTF8)
 
-class OpenSCADError(Exception):
+try:
+    import FreeCAD
+    BaseError = FreeCAD.Base.FreeCADError
+except ImportError,AttributeError:
+    BaseError = RuntimeError
+
+class OpenSCADError(BaseError):
     def __init__(self,value):
         self.value= value
     #def __repr__(self):
diff --git a/src/Mod/OpenSCAD/exportDRAWEXE.py b/src/Mod/OpenSCAD/exportDRAWEXE.py
index ae4b3cb75..5b6888f32 100644
--- a/src/Mod/OpenSCAD/exportDRAWEXE.py
+++ b/src/Mod/OpenSCAD/exportDRAWEXE.py
@@ -95,9 +95,10 @@ def saveShape(csg,filename,shape,name,hasplacement = True,cleanshape=False):
     breppath=os.path.join(spath,'%s.brep'%uname)
     csg.write("restore %s.brep %s\n" % (uname,name))
     if cleanshape:
+        import Part
         try:
             shape = shape.cleaned()
-        except:
+        except Part.OCCError:
             shape = shape.copy()
     if hasplacement is None:  # saved with placement
         hasplacement = False # saved with placement
diff --git a/src/Mod/OpenSCAD/importCSG.py b/src/Mod/OpenSCAD/importCSG.py
index 1daca0e95..b25766e0c 100644
--- a/src/Mod/OpenSCAD/importCSG.py
+++ b/src/Mod/OpenSCAD/importCSG.py
@@ -92,7 +92,7 @@ def insert(filename,docname):
     groupname = os.path.splitext(os.path.basename(filename))[0]
     try:
         doc=FreeCAD.getDocument(docname)
-    except:
+    except FreeCAD.Base.FreeCADError:
         doc=FreeCAD.newDocument(docname)
     #importgroup = doc.addObject("App::DocumentObjectGroup",groupname)
     if filename.lower().endswith('.scad'):
@@ -599,10 +599,7 @@ def process_linear_extrude(obj,h) :
     mylinear.Base = newobj #obj
     mylinear.Dir = (0,0,h)
     mylinear.Placement=FreeCAD.Placement()
-    try:
-        mylinear.Solid = True
-    except:
-        pass
+    mylinear.Solid = True
     if gui:
         newobj.ViewObject.hide()
     return(mylinear)
diff --git a/src/Mod/OpenSCAD/prototype.py b/src/Mod/OpenSCAD/prototype.py
index a73cabe1c..b1996cb9b 100644
--- a/src/Mod/OpenSCAD/prototype.py
+++ b/src/Mod/OpenSCAD/prototype.py
@@ -340,8 +340,7 @@ class Node:
                     try:
                         global lastimportpath
                         filename=os.path.join(lastimportpath,filename)
-                    except:
-                        raise #no path given
+                    except: raise #no path given
                 # Check for a mesh fileformat support by the Mesh mddule
                 if extension.lower() in reverseimporttypes()['Mesh']:
                     import Mesh
@@ -372,10 +371,7 @@ class Node:
                     global dxfcache
                     layers=dxfcache.get(id(doc),[])
                     if layers:
-                        try:
-                            groupobj=[go for go in layers if (not layera) or go.Label == layera]
-                        except:
-                            groupobj= None
+                        groupobj=[go for go in layers if (not layera) or go.Label == layera]
                     else:
                         groupobj= None
                     if not groupobj:
@@ -392,7 +388,7 @@ class Node:
                         edges.extend(shapeobj.Shape.Edges)
                     try:
                         f=edgestofaces(edges)
-                    except:
+                    except Part.OCCError:
                         FreeCAD.Console.PrintError(\
  'processing of dxf import faild\nPlease rework \'%s\' manualy\n' % layera)
                         f=Part.Shape() #empty Shape
@@ -507,8 +503,7 @@ class Node:
         if fcpar:
             try:
                 obj.ViewObject.hide()
-            except:
-                raise
+            except: raise
             if True: #never refine the Shape, as it itroduces crashes
                 return obj
             else: #refine Shape
@@ -684,7 +679,7 @@ def open(filename):
 def insert(filename,docname):
     try:
         doc=FreeCAD.getDocument(docname)
-    except:
+    except NameError:
         doc=FreeCAD.newDocument(docname)
     readfile(filename).addtofreecad(doc)
     #doc.recompute()