Limit case: we cannot split reaches that contains less than 3 profiles, and not split on a limit profile (first or last one)

src/Model/River.py

@@ -963,6 +963,12 @@ Last export at: @date."""
         self._results[solv_type] = results
 
     def _split_reach(self, reach, profile):
+        profiles = reach.reach.profiles
+        if not profiles or profile not in profiles[1:-1]:
+            raise ValueError(
+                "A reach cannot be split at its first or last profile"
+            )
+
         node1 = reach.node1
         node2 = reach.node2
 

src/View/Network/GraphWidget.py

@@ -32,6 +32,7 @@ from PyQt5.QtGui import (
 from PyQt5.QtWidgets import (
     QApplication, QGraphicsScene, QGraphicsView,
     QGraphicsItem, QGraphicsTextItem, QMenu,
+    QMessageBox,
 )
 
 from Model.Network.Node import Node
@@ -724,6 +725,16 @@ class GraphWidget(QGraphicsView):
 
     def split_edge(self, item):
         edge = item.edge
+        if len(edge.reach.profiles) < 3:
+            QMessageBox.information(
+                self,
+                self._trad["menu_split_edge"],
+                _translate(
+                    "Network",
+                    "No profile is available to split this reach."
+                )
+            )
+            return
 
         dlg = SelectProfileDialog(
             study=self.parent._study,

src/View/Network/ProfileDialog.py

@@ -73,7 +73,10 @@ class SelectProfileDialog(PamhyrDialog):
             list(
                 map(
                     lambda p: p.display_name(),
-                    self._reach.reach.profiles)))
+                    self._reach.reach.profiles[1:-1]
+                )
+            )
+        )
 
     def accept(self):
         profile = self.get_combobox_text("comboBox")
@@ -81,7 +84,7 @@ class SelectProfileDialog(PamhyrDialog):
         self._profile = next(
             filter(
                 lambda p: p.display_name() == profile,
-                self._reach.reach.profiles
+                self._reach.reach.profiles[1:-1]
             )
         )