diff --git a/Frontend Angular 4/src/app/layout/plotter/graph2D/graph2D.component.ts b/Frontend Angular 4/src/app/layout/plotter/graph2D/graph2D.component.ts
index 632a7ed28e85ca9ab38adbdd74d2fcb7399d1e2d..900374f8c1aeb91bd890c19a013ce9c805f59c56 100755
--- a/Frontend Angular 4/src/app/layout/plotter/graph2D/graph2D.component.ts	
+++ b/Frontend Angular 4/src/app/layout/plotter/graph2D/graph2D.component.ts	
@@ -1056,7 +1056,7 @@ generateFunctionAndExp = function (exp,graph,namefun6) {
         var lisB = this.generateFunctionAndExp(exp.exp2,graph,namefun6);
         var cond = this.createListExp(exp.cond);
         var g = this.createListExp(exp.cond);
-        var aux121 = [];
+        
         var cond2 = g.splice(1);
         var union = g[0]
 
@@ -1065,6 +1065,7 @@ generateFunctionAndExp = function (exp,graph,namefun6) {
             union = '('+union+' && '+a+')';
         }
         for (var fun1 of lisA){
+            var aux121 = [];
             if(fun1[0] == 'N'){
                 if(cond.length == 0){
                     aux121[0]='N';