diff --git a/src/app/formulaire/definition/concrete/form-bief.ts b/src/app/formulaire/definition/concrete/form-bief.ts
index 7aa4a69506db16b5d6e5741d066d181502d7621d..90edbe1357d1acfa7892966c702b05bbd1e08eb3 100644
--- a/src/app/formulaire/definition/concrete/form-bief.ts
+++ b/src/app/formulaire/definition/concrete/form-bief.ts
@@ -60,7 +60,6 @@ export class FormulaireBief extends FormulaireBase {
                     break;
 
                 case "fs_water_line":
-                    console.log("reset water line");
                     this.reset();
                     // Either Z1 or Z2 is calculable, depending on Regime
                     this.getFieldsetById("fs_condlim").updateFields();
diff --git a/src/locale/messages.en.json b/src/locale/messages.en.json
index 4e2f733dafb988480c30b766a0e5cd951ed32a54..1a3c9fa666e4e77892ede56d6e4abd71411b488f 100644
--- a/src/locale/messages.en.json
+++ b/src/locale/messages.en.json
@@ -5,6 +5,8 @@
     "WARNING_NOTCH_SUBMERSION_GREATER_THAN_07": "Notch formula is discouraged when submersion is greater than 0.7",
     "WARNING_SLOT_SUBMERSION_NOT_BETWEEN_07_AND_09": "Slot formula is discouraged when submersion is lower than 0.7 or greater than 0.9",
     "ERROR_ABSTRACT": "%nb% errors occurred during calculation",
+    "ERROR_BIEF_Z1_CALC_FAILED": "Unable to calculate upstream elevation (calculation interrupted before upstream)",
+    "ERROR_BIEF_Z2_CALC_FAILED": "Unable to calculate downstream elevation (calculation interrupted before downstream)",
     "ERROR_DICHO_CONVERGE": "Dichotomy could not converge",
     "ERROR_DICHO_FUNCTION_VARIATION": "unable to determinate function direction of variation",
     "ERROR_DICHO_INIT_DOMAIN": "Dichotomy: target %targetSymbol%=%targetValue% does not exist for variable %variableSymbol% valued in interval %variableInterval%",
diff --git a/src/locale/messages.fr.json b/src/locale/messages.fr.json
index 39603c3860ac8580f3843f0abe9b3712e047f2e8..60eb2c965feadda22e1d0c91651a05b9f291a901 100644
--- a/src/locale/messages.fr.json
+++ b/src/locale/messages.fr.json
@@ -5,6 +5,8 @@
     "WARNING_NOTCH_SUBMERSION_GREATER_THAN_07": "La formule de l'échancrure n'est pas conseillée pour un ennoiement supérieur à 0.7",
     "WARNING_SLOT_SUBMERSION_NOT_BETWEEN_07_AND_09": "La formule de la fente n'est pas conseillée pour un ennoiement inférieur à 0.7 et supérieur à 0.9",
     "ERROR_ABSTRACT": "%nb% erreurs rencontrées lors du calcul",
+    "ERROR_BIEF_Z1_CALC_FAILED": "Impossible de calculer la cote amont (calcul interrompu avant l'amont)",
+    "ERROR_BIEF_Z2_CALC_FAILED": "Impossible de calculer la cote aval (calcul interrompu avant l'aval)",
     "ERROR_DICHO_CONVERGE": "La dichotomie n'a pas pu converger",
     "ERROR_DICHO_FUNCTION_VARIATION": "Dichotomie : impossible de determiner le sens de  variation de la fonction",
     "ERROR_DICHO_INIT_DOMAIN": "Dichotomie : la valeur cible %targetSymbol%=%targetValue% n'existe pas pour la variable %variableSymbol% prise dans l'intervalle %variableInterval%",