RubarBE: split critical Shields stress (TCADIM) from water viscosity (VISC)

src/View/RunSolver/Translate.py

@@ -43,6 +43,12 @@ class RunSolverTranslate(PamhyrTranslate):
             "Export cancelled: REGIME=1 is incompatible with CONDAM=0. "
             "A reflecting upstream boundary cannot impose the water depth."
         )
+        self._dict["missing_tcadim"] = _translate(
+            "Solver",
+            "Export cancelled: {key}: the selected transport law and options "
+            "use a dimensionless critical stress given by the user. "
+            "Fill it in the parameters (tab Solid Transport)."
+        )
         self._dict["missing_solid_boundary"] = _translate(
             "Solver",
             "Export cancelled: sediment transport (TRASED) is enabled but "