diff --git a/frontend/src/app/data.service.ts b/frontend/src/app/data.service.ts
index 8c25620..7412fac 100644
--- a/frontend/src/app/data.service.ts
+++ b/frontend/src/app/data.service.ts
@@ -141,7 +141,20 @@ export class DataService {
   * @returns the name of the corresponding contract
   */
   public getContractName(contractId: string): string{
-    return this.contracts.find((contract)=> {return contract.id == contractId;}).name;
+    for (const contract of this.contracts) {
+      if(contract.id == contractId){
+        console.log(contract);
+        return contract.name;
+      }
+    }
+    console.log("KEIN VERTRAG GEFUNDEN");
+    return "";
+    // console.log(this.contracts);
+    // if(!this.contracts.find((contract)=> {contract.id == contractId;})){
+    //   console.log("ERROR");
+    //   console.log()
+    // }
+    // return this.contracts.find((contract)=> {return contract.id == contractId;}).name;
   }
 
     /**
diff --git a/frontend/src/app/filter-dialog/filter-dialog.component.ts b/frontend/src/app/filter-dialog/filter-dialog.component.ts
index 8898f19..d53eadc 100644
--- a/frontend/src/app/filter-dialog/filter-dialog.component.ts
+++ b/frontend/src/app/filter-dialog/filter-dialog.component.ts
@@ -193,9 +193,9 @@ export class FilterDialogComponent implements OnInit {
       for (const contract of this.dataService.getContracts()) {
         this.contracts.push(contract.name);
       }
-      for (const paketType of this.dataService.getPaketTypes()) {
-        this.paketTypes.push(paketType.name);
-      }
+      // for (const paketType of this.dataService.getPaketTypes()) {
+      //   this.paketTypes.push(paketType.name);
+      // }
   }
 
   /**
diff --git a/frontend/src/app/ntt-gantt/ntt-gantt.component.html b/frontend/src/app/ntt-gantt/ntt-gantt.component.html
index 0c33aa8..d448d98 100644
--- a/frontend/src/app/ntt-gantt/ntt-gantt.component.html
+++ b/frontend/src/app/ntt-gantt/ntt-gantt.component.html
@@ -55,7 +55,7 @@
 
   <button mat-basic-button *ngIf="isUserPreset" class="editButton" (click)="openRenameDialog()" color="" style="" ><mat-icon>edit</mat-icon></button>
   <button mat-basic-button *ngIf="isUserPreset" class="deleteButton" (click)="openDeleteDialog()" color="" style="" ><mat-icon>delete_forever</mat-icon></button>
-  <button  mat-raised-button style="margin-top: 5px; margin-left: 10px; height: 50px; margin-right: 5px;" aria-label="Refresh" (click)="refreshGanttwithPresets()">
+  <button  mat-raised-button style="margin-top: 5px; margin-left: 10px; height: 50px; margin-right: 5px;" aria-label="Refresh" (click)="refreshGanttWithFilters()">
     <mat-icon >restart_alt</mat-icon>
   </button>
   <h3 *ngIf="userId" style="font-family: Arial, Helvetica, sans-serif;"><mat-icon style="color: green;">verified_user</mat-icon>{{this.userId}}</h3>
diff --git a/frontend/src/app/ntt-gantt/ntt-gantt.component.ts b/frontend/src/app/ntt-gantt/ntt-gantt.component.ts
index c9697b6..beac961 100644
--- a/frontend/src/app/ntt-gantt/ntt-gantt.component.ts
+++ b/frontend/src/app/ntt-gantt/ntt-gantt.component.ts
@@ -507,6 +507,40 @@ export class NttGanttComponent implements OnInit {
         }
     });
   }
+
+  /**
+   * The function refreshData fetches a new changes Array from the backend, therefore the mapRequestJSON function is called to map the requestJSON with all filter and sort parameters.
+   * Furthermore it evaluates the result if the applied filters delivered any Results.
+   * This function is the most called Funktion in the whole project, it is triggered by a pageEvent, when a filter gets applied and much more...
+  */
+  refreshGanttWithFilters(){
+    this.resetBulkOpButtons();
+    this.disableSpin = false;
+    this.editUserPreferences();
+    this.showNoResultsError = false;
+    this.renderGantt = false;
+    this.dataService.fetchChanges(this.mapRequestJSON()).then((res: any[])=>{
+      this.allResources = res;
+        this.mapTasksToResources(this.sliceStart,this.sliceEnd);
+        if(res.length > 0){
+          if(res.length == 1){
+            this.disableSpin = true;
+          }
+          this.spin = true;
+          this.renderGantt = true;
+          this.showNoResultsError = false;
+          if(this.selectedScalar == this.scalars[1]){
+            this.renderplanTime = true;
+          }
+
+        }else{
+          this.renderGantt = false;
+          this.spin = false;
+          this.showNoResultsError = true;
+          this.renderplanTime = false;
+        }
+    });
+  }
   /**
    * The function clearFilter clears allFilter parameters and set them to inital values, then it triggers the refreshData function to fetch the changes without any filters except the supportGroup filter.
    * This function is triggered if the user disables the apply filter switch