handle ODE errors gracefully

git-svn-id: https://pycam.svn.sourceforge.net/svnroot/pycam/trunk@1038 bbaffbd6-741e-11dd-a85d-61de82d9cad9

src/pycam/Toolpath/Generator.py

@@ -443,7 +443,12 @@ def _get_physics(models, cutter, calculation_backend):
         return None
     elif calculation_backend == "ODE":
         import pycam.Physics.ode_physics as ode_physics
+        try:
             return ode_physics.generate_physics(models, cutter)
+        except MemoryError:
+            return "The ODE library returned an unexpected error " + \
+                    "condition. You need to to disable ODE for this " + \
+                    "calculation. Sorry!"
     else:
         return "Invalid calculation backend (%s): not one of %s" \
                 % (calculation_backend, CALCULATION_BACKENDS)