Solver, Meshing: Mage: Add some exit condition.

src/Meshing/Mage.py

@@ -182,6 +182,9 @@ class MeshingWithMage(AMeshingTool):
     ###########
 
     def meshing(self, reach, step: float = 50):
+        if reach is None or len(reach.profiles) == 0:
+            return reach
+
         with tempfile.TemporaryDirectory() as tmp:
             st_file = self.export_reach_to_st(reach, tmp)
             m_file = st_file.rsplit(".ST", 1)[0] + ".M"