Fix #183

src/app/formulaire/ngparam.ts

@@ -98,6 +98,7 @@ export class NgParameter extends InputField implements Observer {
                         // calculated param ?
                         if (targetParam.valueMode === ParamValueMode.CALCUL) {
                             // was the result already computed ?
+                            // @WAARNING .result might be set but the computation might have failed (dichotomy for ex.)
                             if (p.referencedValue.nub.result) {
                                 if (p.referencedValue.hasMultipleValues()) {
                                     // like LIST mode
@@ -110,7 +111,8 @@ export class NgParameter extends InputField implements Observer {
                                     if (vCalc) {
                                         valuePreview = String(vCalc.toFixed(nDigits));
                                     } else {
-                                        throw new Error("NgParameter.preview() : No vCalc for computed target Nub !");
+                                        // computation has been run but has failed
+                                        valuePreview = i18n.localizeText("INFO_PARAMFIELD_CALCULATION_FAILED");
                                     }
                                 }
                             } else {

src/locale/messages.en.json

@@ -159,6 +159,7 @@
     "INFO_PARAMFIELD_GRAPH_TYPE_HISTOGRAM": "Histogram",
     "INFO_PARAMFIELD_GRAPH_SELECT_X_AXIS": "Variable for X axis",
     "INFO_PARAMFIELD_GRAPH_SELECT_Y_AXIS": "Variable for Y axis",
+    "INFO_PARAMFIELD_CALCULATION_FAILED": "Calculation failed",
     "INFO_PARAMFIELD_IN_CALCULATION": "In calculation",
     "INFO_PARAMFIELD_IN_CALCULATION_INITIAL_VALUE": "initial value",
     "INFO_PARAMFIELD_PARAMCALCULER": "Calculate",

src/locale/messages.fr.json

@@ -159,6 +159,7 @@
     "INFO_PARAMFIELD_GRAPH_TYPE_HISTOGRAM": "Histogramme",
     "INFO_PARAMFIELD_GRAPH_SELECT_X_AXIS": "Variable en abscisse",
     "INFO_PARAMFIELD_GRAPH_SELECT_Y_AXIS": "Variable en ordonnée",
+    "INFO_PARAMFIELD_CALCULATION_FAILED": "Échec du calcul",
     "INFO_PARAMFIELD_IN_CALCULATION": "En calcul",
     "INFO_PARAMFIELD_IN_CALCULATION_INITIAL_VALUE": "valeur initiale",
     "INFO_PARAMFIELD_PARAMCALCULER": "calculer",