diff --git a/src/Mod/Arch/ArchCommands.py b/src/Mod/Arch/ArchCommands.py
index 448e8500d..bd4992b7c 100644
--- a/src/Mod/Arch/ArchCommands.py
+++ b/src/Mod/Arch/ArchCommands.py
@@ -324,7 +324,7 @@ def closeHole(shape):
         nface = Part.Face(Part.Wire(bound))
         shell = Part.makeShell(shape.Faces+[nface])
         solid = Part.Solid(shell)
-    except:
+    except Part.OCCError:
         raise
     else:
         return solid
@@ -350,7 +350,7 @@ def getCutVolume(cutplane,shapes):
             p = cutplane.Shape.copy().Faces[0]
         else:
             p = cutplane.copy().Faces[0]
-    except:
+    except Part.OCCError:
         FreeCAD.Console.PrintMessage(translate("Arch","Invalid cutplane\n"))
         return None,None,None 
     ce = p.CenterOfMass
@@ -430,17 +430,17 @@ def getShapeFromMesh(mesh,fast=True,tolerance=0.001,flat=False,cut=True):
         se = se.removeSplitter()
         if flat:
             return se
-    except:
+    except Part.OCCError:
         try:
             cp = Part.makeCompound(faces)
-        except:
+        except Part.OCCError:
             return None
         else:
             return cp
     else:
         try:
             solid = Part.Solid(se)
-        except:
+        except Part.OCCError:
             return se
         else:
             return solid
diff --git a/src/Mod/Arch/ArchComponent.py b/src/Mod/Arch/ArchComponent.py
index aedea78a7..a0309c116 100644
--- a/src/Mod/Arch/ArchComponent.py
+++ b/src/Mod/Arch/ArchComponent.py
@@ -566,7 +566,7 @@ class Component:
                                         if base.Solids:
                                             try:
                                                 base = base.fuse(s)
-                                            except:
+                                            except Part.OCCError:
                                                 print "Arch: unable to fuse object ",obj.Name, " with ", o.Name
                                     else:
                                         base = s
@@ -604,7 +604,7 @@ class Component:
                                         s.Placement = s.Placement.multiply(placement)
                                     try:
                                         base = base.cut(s)
-                                    except:
+                                    except Part.OCCError:
                                         print "Arch: unable to cut object ",o.Name, " from ", obj.Name
         return base
         
diff --git a/src/Mod/Arch/ArchEquipment.py b/src/Mod/Arch/ArchEquipment.py
index ac4409905..c9d3b6cd6 100644
--- a/src/Mod/Arch/ArchEquipment.py
+++ b/src/Mod/Arch/ArchEquipment.py
@@ -135,7 +135,7 @@ def createMeshView(obj,direction=FreeCAD.Vector(0,0,-1),outeronly=False,largesto
                 shape = shape.fuse(p)
             else:
                 shape = p
-        except:
+        except Part.OCCError:
             pass
     shape = shape.removeSplitter()
 
@@ -151,7 +151,7 @@ def createMeshView(obj,direction=FreeCAD.Vector(0,0,-1),outeronly=False,largesto
         if largest:
             try:
                 f = Part.Face(w)
-            except:
+            except Part.OCCError:
                 print "Unable to produce a face from the outer wire."
             else:
                 shape = f
diff --git a/src/Mod/Arch/ArchRebar.py b/src/Mod/Arch/ArchRebar.py
index ed7a45544..d240608f2 100644
--- a/src/Mod/Arch/ArchRebar.py
+++ b/src/Mod/Arch/ArchRebar.py
@@ -203,7 +203,7 @@ class _Rebar(ArchComponent.Component):
         circle = Part.Wire(circle)
         try:
             bar = wire.makePipeShell([circle],True,False,2)
-        except:
+        except Part.OCCError:
             print "Arch: error sweeping rebar profile along the base sketch"
             return
         # building final shape
diff --git a/src/Mod/Arch/ArchSectionPlane.py b/src/Mod/Arch/ArchSectionPlane.py
index 7f05fc036..099fe99be 100644
--- a/src/Mod/Arch/ArchSectionPlane.py
+++ b/src/Mod/Arch/ArchSectionPlane.py
@@ -357,7 +357,7 @@ class _ArchDrawingView:
                                         try:
                                             s = Part.Wire(s.Edges)
                                             s = Part.Face(s)
-                                        except:
+                                        except Part.OCCError:
                                             pass
                                         nsh.extend(c.Solids)
                                         sshapes.append(s)
diff --git a/src/Mod/Arch/ArchSpace.py b/src/Mod/Arch/ArchSpace.py
index 6cc030051..bb8376e9d 100644
--- a/src/Mod/Arch/ArchSpace.py
+++ b/src/Mod/Arch/ArchSpace.py
@@ -223,7 +223,7 @@ class _Space(ArchComponent.Component):
             w = Part.Wire(e)
             f = Part.Face(w)
             return f.Area
-        except:
+        except Part.OCCError:
             return 0
 
 
@@ -303,7 +303,7 @@ class _ViewProviderSpace(ArchComponent.ViewProviderComponent):
                     pos = vobj.Object.Shape.CenterOfMass
                     z = vobj.Object.Shape.BoundBox.ZMin
                     pos = FreeCAD.Vector(pos.x,pos.y,z)
-                except:
+                except (AttributeError, RuntimeError):
                     pos = FreeCAD.Vector()
             else:
                 pos = vobj.TextPosition
diff --git a/src/Mod/Arch/ArchStructure.py b/src/Mod/Arch/ArchStructure.py
index c41a409ee..43f98d1ab 100644
--- a/src/Mod/Arch/ArchStructure.py
+++ b/src/Mod/Arch/ArchStructure.py
@@ -583,7 +583,7 @@ class _Structure(ArchComponent.Component):
                     if obj.Tool:
                         try:
                             base = obj.Tool.Shape.copy().makePipe(obj.Base.Shape.copy())
-                        except:
+                        except Part.OCCError:
                             FreeCAD.Console.PrintError(translate("Arch","Error: The base shape couldn't be extruded along this tool object"))
                             return
                 if not base:
diff --git a/src/Mod/Arch/ArchVRM.py b/src/Mod/Arch/ArchVRM.py
index 4c5c021d3..7e0f9e2e8 100644
--- a/src/Mod/Arch/ArchVRM.py
+++ b/src/Mod/Arch/ArchVRM.py
@@ -225,7 +225,7 @@ class Renderer:
             wires.append(Part.makePolygon(verts))
         try:
             sh = Part.Face(wires)
-        except:
+        except Part.OCCError:
             if DEBUG: print "Error: Unable to flatten face"
             return None
         else:
@@ -408,6 +408,7 @@ class Renderer:
 
     def join(self,otype):
         "joins the objects of same type"
+        import Part
         walls = []
         structs = []
         objs = []
@@ -428,7 +429,7 @@ class Renderer:
                     try:
                         fs = s.fuse(o.Shape)
                         fs = fs.removeSplitter()
-                    except:
+                    except Part.OCCError:
                         print "shape fusion failed"
                         objs.append([o.Shape,o.ViewObject.DiffuseColor[0]])
                     else:
diff --git a/src/Mod/Arch/ArchWindow.py b/src/Mod/Arch/ArchWindow.py
index 5ff63301b..d57f9839f 100644
--- a/src/Mod/Arch/ArchWindow.py
+++ b/src/Mod/Arch/ArchWindow.py
@@ -1072,7 +1072,7 @@ class _ArchWindowTaskPanel:
                     try:
                         q = FreeCAD.Units.Quantity(t)
                         t = str(q.Value)
-                    except:
+                    except (ValueError,TypeError):
                         ok = False
             ar.append(t)
             
diff --git a/src/Mod/Arch/importDAE.py b/src/Mod/Arch/importDAE.py
index c7084a444..78659dc10 100644
--- a/src/Mod/Arch/importDAE.py
+++ b/src/Mod/Arch/importDAE.py
@@ -40,7 +40,7 @@ def checkCollada():
     COLLADA = None
     try:
         import collada
-    except:
+    except ImportError:
         FreeCAD.Console.PrintError(translate("Arch","pycollada not found, collada support is disabled.\n"))
         return False
     else:
@@ -63,7 +63,7 @@ def insert(filename,docname):
         return
     try:
         doc = FreeCAD.getDocument(docname)
-    except:
+    except NameError:
         doc = FreeCAD.newDocument(docname)
     FreeCAD.ActiveDocument = doc
     read(filename)
diff --git a/src/Mod/Arch/importIFClegacy.py b/src/Mod/Arch/importIFClegacy.py
index f523d3441..57e3b620f 100644
--- a/src/Mod/Arch/importIFClegacy.py
+++ b/src/Mod/Arch/importIFClegacy.py
@@ -73,7 +73,7 @@ def insert(filename,docname,skip=None):
     "called when freecad wants to import a file"
     try:
         doc = FreeCAD.getDocument(docname)
-    except:
+    except NameError:
         doc = FreeCAD.newDocument(docname)
     FreeCAD.ActiveDocument = doc
     getConfig()
@@ -108,10 +108,10 @@ def getIfcOpenShell():
     IFCOPENSHELL5 = False
     try:
         import IfcImport
-    except:
+    except ImportError:
         try:
             import ifc_wrapper as IfcImport
-        except:
+        except ImportError:
             FreeCAD.Console.PrintMessage(translate("Arch","Couldn't locate IfcOpenShell\n"))
             return False
         else:
@@ -937,10 +937,10 @@ def export(exportList,filename):
     ifcw = None
     try:
         import IfcImport as ifcw
-    except:
+    except ImportError:
         try:
             import ifc_wrapper as ifcw
-        except:
+        except ImportError:
             FreeCAD.Console.PrintError(translate("Arch","Error: IfcOpenShell is not installed\n"))
             print """importIFC: ifcOpenShell is not installed. IFC export is unavailable.
                     Note: IFC export currently requires an experimental version of IfcOpenShell
diff --git a/src/Mod/Draft/DraftGui.py b/src/Mod/Draft/DraftGui.py
index 526a1b091..8439aad4a 100644
--- a/src/Mod/Draft/DraftGui.py
+++ b/src/Mod/Draft/DraftGui.py
@@ -35,7 +35,7 @@ import FreeCAD, FreeCADGui, os, Draft, sys
 
 try:
     from PySide import QtCore,QtGui,QtSvg
-except:
+except ImportError:
     FreeCAD.Console.PrintMessage("Error: Python-pyside package must be installed on your system to use the Draft module.")
 
 class todo:
diff --git a/src/Mod/Draft/DraftTrackers.py b/src/Mod/Draft/DraftTrackers.py
index cb5562f47..90de53356 100644
--- a/src/Mod/Draft/DraftTrackers.py
+++ b/src/Mod/Draft/DraftTrackers.py
@@ -304,12 +304,12 @@ class bsplineTracker(Tracker):
                 # YVH: Added a try to bypass some hazardous situations
                 try:
                     c.interpolate(self.points[:-1], True)
-                except:
+                except Part.OCCError:
                     pass
             elif self.points:
                 try:
                     c.interpolate(self.points, False)
-                except:
+                except Part.OCCError:
                     pass
             c = c.toShape()
             buf=c.writeInventor(2,0.01)
@@ -373,13 +373,13 @@ class bezcurveTracker(Tracker):
                 try:
 ###                    c.interpolate(self.points[:-1], True)  #!!!!!!!!!!!!
                        c.setPoles(self.points[:-1])
-                except:
+                except Part.OCCError:
                     pass
             elif self.points:
                 try:
 ###                   c.interpolate(self.points, False)  #!!!!!!!
                       c.setPoles(self.points)
-                except:
+                except Part.OCCError:
                     pass
             c = c.toShape()                              #???? c = Part.Edge(c)?, c = Part.Wire(c)??
             buf=c.writeInventor(2,0.01)
diff --git a/src/Mod/Fem/CalculixLib.py b/src/Mod/Fem/CalculixLib.py
index e3f988673..2cae2899a 100644
--- a/src/Mod/Fem/CalculixLib.py
+++ b/src/Mod/Fem/CalculixLib.py
@@ -175,7 +175,7 @@ def insert(filename,docname):
     "called when freecad wants to import a file"
     try:
         doc = FreeCAD.getDocument(docname)
-    except:
+    except NameError:
         doc = FreeCAD.newDocument(docname)
     FreeCAD.ActiveDocument = doc
     
diff --git a/src/Mod/Import/InitGui.py b/src/Mod/Import/InitGui.py
index 89a4bc99b..092681cdf 100644
--- a/src/Mod/Import/InitGui.py
+++ b/src/Mod/Import/InitGui.py
@@ -39,7 +39,7 @@ class ImportWorkbench ( Workbench ):
 			Log ('Loading ImportGui module')
 			import Import
 			import ImportGui
-		except:
+		except ImportError:
 			Err('Cannot load ImportGui')
 			raise
 	def GetIcon(self):
diff --git a/src/Mod/PartDesign/InitGui.py b/src/Mod/PartDesign/InitGui.py
index 05732d188..4df3d65cc 100644
--- a/src/Mod/PartDesign/InitGui.py
+++ b/src/Mod/PartDesign/InitGui.py
@@ -68,13 +68,13 @@ class PartDesignWorkbench ( Workbench ):
                 # load the module
                 try:
                     from WizardShaft import WizardShaft
-                except:
+                except ImportError:
                     print "Wizard shaft module cannot be loaded"
                 import PartDesignGui
                 import PartDesign
                 try:
                     import InvoluteGearFeature
-                except:
+                except ImportError:
                     print "Involute gear module cannot be loaded"
         def GetClassName(self):
                 return "PartDesignGui::Workbench"
diff --git a/src/Mod/PartDesign/Scripts/Gear.py b/src/Mod/PartDesign/Scripts/Gear.py
index 7ccc7fc82..48e5be2d7 100644
--- a/src/Mod/PartDesign/Scripts/Gear.py
+++ b/src/Mod/PartDesign/Scripts/Gear.py
@@ -32,7 +32,7 @@ def compute():
         c = float(l5.text())*m     #standard value 0,1*m - 0,3*m
         j = float(l6.text())*m     #standard value 0,015 - 0,04*m
         width = float(l7.text())   #gear width           
-    except:
+    except ValueError:
         FreeCAD.Console.PrintError("Wrong input! Only numbers allowed...\n")
     
     
diff --git a/src/Mod/Ship/shipHydrostatics/Tools.py b/src/Mod/Ship/shipHydrostatics/Tools.py
index 88449d722..87a7266e5 100644
--- a/src/Mod/Ship/shipHydrostatics/Tools.py
+++ b/src/Mod/Ship/shipHydrostatics/Tools.py
@@ -78,14 +78,14 @@ def areas(ship, draft, roll=0.0, trim=0.0, yaw=0.0, n=30):
         p = Vector(-1.5 * L, -1.5 * B, bbox.ZMin)
         try:
             box = Part.makeBox(1.5 * L + x, 3.0 * B, -bbox.ZMin, p)
-        except:
+        except Part.OCCError:
             areas.append([x, area])
             continue
         # Compute the common part with ship
         for s in shape.Solids:
             try:
                 common = box.common(s)
-            except:
+            except Part.OCCError:
                 continue
             if common.Volume == 0.0:
                 continue
@@ -93,7 +93,7 @@ def areas(ship, draft, roll=0.0, trim=0.0, yaw=0.0, n=30):
             # computed desired data we can remove it.
             try:
                 Part.show(common)
-            except:
+            except App.Base.FreeCADError:
                 continue
             # Divide the solid by faces and compute only the well placed ones
             faces = common.Faces
@@ -150,7 +150,7 @@ def displacement(ship, draft, roll=0.0, trim=0.0, yaw=0.0):
     p = Vector(-1.5*L, -1.5*B, bbox.ZMin - 1.0)
     try:
         box = Part.makeBox(3.0*L, 3.0*B, - bbox.ZMin + 1.0, p)
-    except:
+    except Part.OCCError:
         return [0.0, Vector(), 0.0]
 
     vol = 0.0
@@ -159,7 +159,7 @@ def displacement(ship, draft, roll=0.0, trim=0.0, yaw=0.0):
         # Compute the common part of the "sea" with the ship
         try:
             common = box.common(solid)
-        except:
+        except Part.OCCError:
             continue
         # Get the data
         vol = vol + common.Volume / Units.Metre.Value**3
@@ -219,13 +219,13 @@ def wettedArea(shape, draft, trim):
     p = Vector(-1.5 * L, -1.5 * B, bbox.ZMin - 1.0)
     try:
         box = Part.makeBox(3.0 * L, 3.0 * B, - bbox.ZMin + 1.0, p)
-    except:
+    except Part.OCCError:
         return 0.0
 
     for f in shape.Faces:
         try:
             common = box.common(f)
-        except:
+        except Part.OCCError:
             continue
         area = area + common.Area
     return area
@@ -280,7 +280,7 @@ def FloatingArea(ship, draft, trim):
     p = Vector(-1.5 * L, -1.5 * B, bbox.ZMin - 1.0)
     try:
         box = Part.makeBox(3.0 * L, 3.0 * B, - bbox.ZMin + 1.0, p)
-    except:
+    except Part.OCCError:
         return [area, cf]
 
     maxX = bbox.XMin / Units.Metre.Value
@@ -290,7 +290,7 @@ def FloatingArea(ship, draft, trim):
     for s in shape.Solids:
         try:
             common = box.common(s)
-        except:
+        except Part.OCCError:
             continue
         if common.Volume == 0.0:
             continue
@@ -298,7 +298,7 @@ def FloatingArea(ship, draft, trim):
         # performing an internal tesellation doing that
         try:
             Part.show(common)
-        except:
+        except (TypeError,Part.OCCError):
             continue
         # Divide the solid by faces and filter the well placed ones
         faces = common.Faces
@@ -377,7 +377,7 @@ def mainFrameCoeff(ship, draft):
     p = Vector(-1.5 * L, -1.5 * B, bbox.ZMin - 1.0)
     try:
         box = Part.makeBox(1.5 * L, 3.0 * B, - bbox.ZMin + 1.0, p)
-    except:
+    except Part.OCCError:
         return cm
 
     maxY = bbox.YMin / Units.Metre.Value
@@ -385,7 +385,7 @@ def mainFrameCoeff(ship, draft):
     for s in shape.Solids:
         try:
             common = box.common(s)
-        except:
+        except Part.OCCError:
             continue
         if common.Volume == 0.0:
             continue
@@ -393,7 +393,7 @@ def mainFrameCoeff(ship, draft):
         # performing an internal tesellation doing that
         try:
             Part.show(common)
-        except:
+        except (TypeError,Part.OCCError):
             continue
         # Divide the solid by faces and filter the well placed ones
         faces = common.Faces
diff --git a/src/Mod/Spreadsheet/Spreadsheet.py b/src/Mod/Spreadsheet/Spreadsheet.py
index d6ed121e6..b8aac22ea 100644
--- a/src/Mod/Spreadsheet/Spreadsheet.py
+++ b/src/Mod/Spreadsheet/Spreadsheet.py
@@ -1047,7 +1047,7 @@ def insert(filename,docname):
     "called when freecad wants to import a csv file"
     try:
         doc = FreeCAD.getDocument(docname)
-    except:
+    except NameError:
         doc = FreeCAD.newDocument(docname)
     FreeCAD.ActiveDocument = doc
     read(filename)
@@ -1069,10 +1069,10 @@ def read(filename):
                 #print "setting ",cl+str(rn)," ",c
                 try:
                     c = int(c)
-                except:
+                except ValueError:
                     try:
                         c = float(c)
-                    except:
+                    except ValueError:
                         c = str(c)
                 setattr(sp.Proxy,cl+str(rn),c)
                 cn += 1