RubarBE: notify when attempting to use RubarBE with solid boundary conditions missing

src/Solver/RubarBE.py

@@ -153,8 +153,22 @@ class Rubar3(CommandLineSolver):
                 qlog.put(trad["warning"].format(message=message))
             return False
 
+        trased = self._parameter_flag(study, "trased") == "O"
+        if trased:
+            # Notice §3.6: HYDROS is required at each upstream boundary
+            missing = self._reaches_without_solid_boundary(study)
+            if missing:
+                trad = RunSolverTranslate()
+                message = trad["missing_solid_boundary"].format(
+                    reaches=", ".join(missing)
+                )
+                logger.warning(message)
+                if qlog is not None:
+                    qlog.put(trad["warning"].format(message=message))
+                return False
+
         self._export_donnee(study, repertory, qlog, name=name)
-        if self._parameter_flag(study, "trased") == "O":
+        if trased:
             if not self._export_ts(study, repertory, qlog, name=name):
                 return False
         self._export_geomac_i(study, repertory, qlog, name=name)
@@ -194,6 +208,20 @@ class Rubar3(CommandLineSolver):
         ("defond", "integer"), ("varcons", "integer"),
     )
 
+    @staticmethod
+    def _reaches_without_solid_boundary(study):
+        river = study.river
+        solid = [
+            bc for bc in river.boundary_condition.get_tab("solid")
+            if not bc.is_deleted() and bc.bctype == "SL" and len(bc) > 0
+        ]
+
+        return [
+            edge.name for edge in river.enable_edges()
+            if river.is_upstream_node(edge.node1)
+            and not any(bc.node == edge.node1 for bc in solid)
+        ]
+
     def _parameter_values(self, study):
         return {p.name: str(p.value).strip()
                 for p in study.river.get_params(self.type).parameters}

src/View/RunSolver/Translate.py

@@ -43,6 +43,13 @@ class RunSolverTranslate(PamhyrTranslate):
             "Export cancelled: REGIME=1 is incompatible with CONDAM=0. "
             "A reflecting upstream boundary cannot impose the water depth."
         )
+        self._dict["missing_solid_boundary"] = _translate(
+            "Solver",
+            "Export cancelled: sediment transport (TRASED) is enabled but "
+            "no solid boundary condition is defined at the upstream node "
+            "of reach(es): {reaches}. Add a solid boundary condition, or "
+            "disable sediment transport in the solver parameters."
+        )
         self._dict["export_failed"] = _translate(
             "Solver", "Export failed; task cancelled"
         )