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"

src/Solver/Mage.py

@@ -234,7 +234,7 @@ class Mage(CommandLineSolver):
     def _export_BC(self, t, bounds, repertory, qlog, name="0"):
         files = []
 
-        if len(bounds) == 0:
+        if len(bounds) == 0 or bounds.node is None:
             return files
 
         if qlog is not None:
@@ -351,6 +351,9 @@ class Mage(CommandLineSolver):
                 frictions = edge.frictions
 
                 for friction in frictions.frictions:
+                    if friction.begin_strickler is None:
+                        continue
+
                     num = f"{id:>3}"
                     bkp = f"{friction.begin_kp:>10.3f}"
                     ekp = f"{friction.end_kp:>10.3f}"
@@ -416,7 +419,7 @@ class Mage(CommandLineSolver):
         files = []
 
         reservoirs = study.river.reservoir.lst
-        if len(reservoirs) == 0:
+        if len(reservoirs) == 0 or reservoirs.node is None:
             return files
 
         if qlog is not None: