diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3d2210a9fa4f6653fd0b0989597c85758b7cedb0..d2b6603b5a0069fe959dc9bc7c134be92d4cd44b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - #32 => Criteria components with default value did not work
 - #79 => Repair and improve component checkbox + test
 - #80 => Search type field + IN or NOT IN didn't work
+- #63 => If no outputs selectionned, request cannot work
 
 ### Changed
 - #76 => Adding label min and max for the between component
diff --git a/src/app/search/components/output/output-by-category.component.spec.ts b/src/app/search/components/output/output-by-category.component.spec.ts
index 1854fa3ea627e63a10763b8efc3cb89cf69e5c71..713096dac97179f176eabdccdee296b8b333b4d7 100644
--- a/src/app/search/components/output/output-by-category.component.spec.ts
+++ b/src/app/search/components/output/output-by-category.component.spec.ts
@@ -1,6 +1,8 @@
 import { async, ComponentFixture, TestBed } from '@angular/core/testing';
 import { Component, ViewChild } from '@angular/core';
 
+import { ToastrModule } from 'ngx-toastr';
+import { ToastrService } from 'ngx-toastr';
 import { OutputByCategoryComponent } from './output-by-category.component';
 import { Attribute } from '../../../metamodel/model';
 import { ATTRIBUTE_LIST } from '../../../../settings/test-data';
@@ -36,7 +38,9 @@ describe('[Search][Output] Component: OutputByCategoryComponent', () => {
             declarations: [
                 OutputByCategoryComponent,
                 TestHostComponent
-            ]
+            ],
+            imports: [ToastrModule.forRoot()],
+            providers: [ToastrService]
         });
         testHostFixture = TestBed.createComponent(TestHostComponent);
         testHostComponent = testHostFixture.componentInstance;
diff --git a/src/app/search/components/output/output-by-category.component.ts b/src/app/search/components/output/output-by-category.component.ts
index 54ce630c5dd49728794f24df543801203dd4e7a1..f12fde2838141a7aa54d30a5bb4240e5e81db464 100644
--- a/src/app/search/components/output/output-by-category.component.ts
+++ b/src/app/search/components/output/output-by-category.component.ts
@@ -1,5 +1,6 @@
 import { Component, Input, Output, EventEmitter, ChangeDetectionStrategy } from '@angular/core';
 
+import { ToastrService } from 'ngx-toastr';
 import { Attribute } from '../../../metamodel/model';
 
 @Component({
@@ -11,10 +12,23 @@ import { Attribute } from '../../../metamodel/model';
 export class OutputByCategoryComponent {
     @Input() categoryLabel: string;
     @Input() attributeList: Attribute[];
-    @Input() outputList: number[];
+    @Input() set outputList(outputList: number[]) {
+        this._outputList = outputList;
+        if (outputList.length === 0) {
+            this.toastr.warning('At least 1 output is required!');
+            this.outputListEmpty.emit(true);
+        } else {
+            this.outputListEmpty.emit(false);
+        }
+    }
     @Input() isAllSelected: boolean;
     @Input() isAllUnselected: boolean;
+    @Output() outputListEmpty: EventEmitter<boolean> = new EventEmitter();
     @Output() change: EventEmitter<number[]> = new EventEmitter();
+    public _outputList: number[];
+
+
+    constructor(private toastr: ToastrService) { }
 
     getAttributeListSortedByDisplay() {
         return this.attributeList
@@ -22,11 +36,11 @@ export class OutputByCategoryComponent {
     }
 
     isSelected(id: number) {
-        return this.outputList.filter(i => i === id).length > 0;
+        return this._outputList.filter(i => i === id).length > 0;
     }
 
     toggleSelection(attributeId: number): void {
-        const clonedOutputList = [...this.outputList];
+        const clonedOutputList = [...this._outputList];
         const index = clonedOutputList.indexOf(attributeId);
         if (index > -1) {
             clonedOutputList.splice(index, 1);
@@ -37,7 +51,7 @@ export class OutputByCategoryComponent {
     }
 
     selectAll(): void {
-        const clonedOutputList = [...this.outputList];
+        const clonedOutputList = [...this._outputList];
         const attributeListId = this.attributeList.map(a => a.id);
         attributeListId.filter(id => clonedOutputList.indexOf(id) === -1).forEach(id => {
             clonedOutputList.push(id);
@@ -46,7 +60,7 @@ export class OutputByCategoryComponent {
     }
 
     unselectAll(): void {
-        const clonedOutputList = [...this.outputList];
+        const clonedOutputList = [...this._outputList];
         const attributeListId = this.attributeList.map(a => a.id);
         attributeListId.filter(id => clonedOutputList.indexOf(id) > -1).forEach(id => {
             const index = clonedOutputList.indexOf(id);
diff --git a/src/app/search/components/output/output-by-family.component.html b/src/app/search/components/output/output-by-family.component.html
index 61fb7281e239e584e9fbf7efa62ca9cce08c9db0..16fbe74fbdab6c489c2f190829c76c8a0d838e9b 100644
--- a/src/app/search/components/output/output-by-family.component.html
+++ b/src/app/search/components/output/output-by-family.component.html
@@ -7,6 +7,7 @@
             [outputList]="outputList" 
             [isAllSelected]="getIsAllSelected(category.id)"
             [isAllUnselected]="getIsAllUnselected(category.id)" 
+            (outputListEmpty)="outputListEmpty.emit($event)"
             (change)="emitChange($event)">
         </app-output-by-category>
     </div>
diff --git a/src/app/search/components/output/output-by-family.component.ts b/src/app/search/components/output/output-by-family.component.ts
index 3da47155e2d4aba66a6b3386cb7804c6d030e74e..e23b29ab7df92d886e64d733c1e4218c762ea28d 100644
--- a/src/app/search/components/output/output-by-family.component.ts
+++ b/src/app/search/components/output/output-by-family.component.ts
@@ -12,6 +12,7 @@ export class OutputByFamilyComponent {
     @Input() categoryList: Category[];
     @Input() datasetAttributeList: Attribute[];
     @Input() outputList: number[];
+    @Output() outputListEmpty: EventEmitter<boolean> = new EventEmitter();
     @Output() change: EventEmitter<number[]> = new EventEmitter();
 
     getCategoryByFamilySortedByDisplay(idFamily: number): Category[] {
diff --git a/src/app/search/components/output/output-tabs.component.html b/src/app/search/components/output/output-tabs.component.html
index 93ba0ecb6ef19172bb7660b46134680215df2a21..49a90056b11253f0a77b7f638d4f54c2f151c0cb 100644
--- a/src/app/search/components/output/output-tabs.component.html
+++ b/src/app/search/components/output/output-tabs.component.html
@@ -7,7 +7,8 @@
                 [datasetAttributeList]="datasetAttributeList"
                 [categoryList]="categoryList" 
                 [outputList]="outputList" 
-                (change)="emitChange($event)">
+                (outputListEmpty)="outputListEmpty.emit($event)"
+                (change)="change.emit($event)">
             </app-output-by-family>
         </div>
     </div>
@@ -28,8 +29,9 @@
             [outputFamily]="family" 
             [datasetAttributeList]="datasetAttributeList"
             [categoryList]="categoryList" 
-            [outputList]="outputList" 
-            (change)="emitChange($event)">
+            [outputList]="outputList"
+            (outputListEmpty)="outputListEmpty.emit($event)"
+            (change)="change.emit($event)">
         </app-output-by-family>
     </accordion-group>
 </accordion>
\ No newline at end of file
diff --git a/src/app/search/components/output/output-tabs.component.spec.ts b/src/app/search/components/output/output-tabs.component.spec.ts
index bdbc344bd277ba85c5d01d0a736f626c9ecfcc34..f7de6c9fbcd8083d4371e0331fb879072b299e3b 100644
--- a/src/app/search/components/output/output-tabs.component.spec.ts
+++ b/src/app/search/components/output/output-tabs.component.spec.ts
@@ -65,11 +65,5 @@ describe('[Search][Output] Component: OutputTabsComponent', () => {
         expect(sortedOutputFamilyList[0].id).toBe(2);
         expect(sortedOutputFamilyList[1].id).toBe(1);
     });
-
-    it('#emitChange(outputList) should raise change event', () => {
-        const expectedOutputList = [1];
-        testedComponent.change.subscribe((event: number[]) => expect(event).toEqual(expectedOutputList));
-        testedComponent.emitChange([1]);
-    });
 });
 
diff --git a/src/app/search/components/output/output-tabs.component.ts b/src/app/search/components/output/output-tabs.component.ts
index fedded17ffcbc26d252c946ea060c09f6d762f27..c6bee89452710392b6ae1e7fe0e5130c4ed277b7 100644
--- a/src/app/search/components/output/output-tabs.component.ts
+++ b/src/app/search/components/output/output-tabs.component.ts
@@ -12,14 +12,11 @@ export class OutputTabsComponent {
     @Input() categoryList: Category[];
     @Input() datasetAttributeList: Attribute[];
     @Input() outputList: number[];
+    @Output() outputListEmpty: EventEmitter<boolean> = new EventEmitter();
     @Output() change: EventEmitter<number[]> = new EventEmitter();
 
     getOutputFamilyListSortedByDisplay(): Family[] {
         return this.outputFamilyList
             .sort((a, b) => a.display - b.display);
     }
-
-    emitChange(clonedOutpuList: number[]): void {
-        this.change.emit(clonedOutpuList);
-    }
 }
diff --git a/src/app/search/components/progress-bar.component.html b/src/app/search/components/progress-bar.component.html
index 4ccdbe2489cc42a6b19749fdb6cc7af1e0e2ad0b..9ba611d6409b1f7fc62bad2dfdba2cef6b27af36 100644
--- a/src/app/search/components/progress-bar.component.html
+++ b/src/app/search/components/progress-bar.component.html
@@ -49,7 +49,7 @@
             </a>
         </li>
         <li class="nav-item" [ngClass]="{'active': currentStep === 'result', 'checked': resultStepChecked}">
-            <a *ngIf="datasetName" class="nav-link" [ngClass]="{'disabled': !datasetName}"
+            <a *ngIf="datasetName" class="nav-link" [ngClass]="{'disabled': outputListEmpty}"
                 routerLink="/search/result/{{datasetName}}" [queryParams]="queryParams" data-toggle="tab">
                 <div class="icon-circle">
                     <span class="fas fa-table"></span>
diff --git a/src/app/search/components/progress-bar.component.ts b/src/app/search/components/progress-bar.component.ts
index 6e21d2b37b57345391a2e5f90d8ab89b7ddc91a8..16e4039300ce652b0aeb8a098c951b088042206a 100644
--- a/src/app/search/components/progress-bar.component.ts
+++ b/src/app/search/components/progress-bar.component.ts
@@ -1,5 +1,7 @@
 import { Component, Input, ChangeDetectionStrategy } from '@angular/core';
 
+import { SearchQueryParams } from '../store/model';
+
 @Component({
     selector: 'app-progress-bar',
     templateUrl: 'progress-bar.component.html',
@@ -12,7 +14,8 @@ export class ProgressBarComponent {
     @Input() criteriaStepChecked: boolean;
     @Input() outputStepChecked: boolean;
     @Input() resultStepChecked: boolean;
-    @Input() queryParams: any;
+    @Input() queryParams: SearchQueryParams;
+    @Input() outputListEmpty: boolean;
 
     getStepClass() {
         switch (this.currentStep) {
diff --git a/src/app/search/components/summary.component.html b/src/app/search/components/summary.component.html
index 86f7f7577194347a63edcc9dcf07b0777dd10c07..d5cc32639f5cfa91f0e980cdcc335b5638b9271d 100644
--- a/src/app/search/components/summary.component.html
+++ b/src/app/search/components/summary.component.html
@@ -20,7 +20,10 @@
     <p class="text-center font-italic" [tooltip]="summaryOutputs">
         Output <span class="far fa-question-circle fa-xs"></span>
     </p>
-    <ul class="pl-5 list-unstyled">
+    <p *ngIf="outputList.length < 1" class="pl-5 text-danger font-weight-bold">
+        At least 1 output required!
+    </p>
+    <ul *ngIf="outputList.length > 0" class="pl-5 list-unstyled">
         <li *ngFor="let output of outputList">
             {{ getAttribute(output).form_label }}
         </li>
diff --git a/src/app/search/components/summary.component.ts b/src/app/search/components/summary.component.ts
index be26bef6cd693e08c34073af37882067756a89f6..6da9b7071fea792dc45748a4009f30dacab03560 100644
--- a/src/app/search/components/summary.component.ts
+++ b/src/app/search/components/summary.component.ts
@@ -1,6 +1,6 @@
 import { Component, Input, ChangeDetectionStrategy } from '@angular/core';
 
-import { Criterion } from '../store/model';
+import { Criterion, SearchQueryParams } from '../store/model';
 import { Dataset, Attribute, Family, Category } from '../../metamodel/model';
 import { printCriterion as print } from '../../shared/utils'
 
@@ -19,7 +19,8 @@ export class SummaryComponent {
     @Input() outputFamilyList: Family[];
     @Input() categoryList: Category[];
     @Input() outputList: number[];
-    @Input() queryParams: any;
+    @Input() queryParams: SearchQueryParams;
+    @Input() outputListEmpty: boolean;
 
     getDataset(): Dataset {
         return this.datasetList.find(dataset => dataset.name === this.datasetName);
diff --git a/src/app/search/containers/output.component.css b/src/app/search/containers/output.component.css
new file mode 100644
index 0000000000000000000000000000000000000000..252761f5ab73ebc704197c3a19694df2f803509e
--- /dev/null
+++ b/src/app/search/containers/output.component.css
@@ -0,0 +1,3 @@
+.disabled {
+    cursor: not-allowed;
+}
\ No newline at end of file
diff --git a/src/app/search/containers/output.component.html b/src/app/search/containers/output.component.html
index 1a37564079aa15ba2adb77b28fcd9eca713f95e9..ab9a65946ccfed88e1089b93b516864c8a6c7a91 100644
--- a/src/app/search/containers/output.component.html
+++ b/src/app/search/containers/output.component.html
@@ -11,6 +11,7 @@
             [categoryList]="categoryList | async"
             [datasetAttributeList]="datasetAttributeList | async" 
             [outputList]="outputList | async"
+            (outputListEmpty)="emitOutputListEmpty($event)"
             (change)="updateOutputList($event)">
         </app-output-tabs>
     </div>
@@ -24,6 +25,7 @@
             [outputFamilyList]="outputFamilyList | async"
             [categoryList]="categoryList | async"
             [outputList]="outputList | async"
+            [outputListEmpty]="outputListEmpty | async"
             [queryParams]="queryParams | async">
         </app-summary>
     </div>
@@ -36,9 +38,14 @@
         </a>
     </div>
     <div class="col col-auto">
-        <a routerLink="/search/result/{{datasetName | async}}" [queryParams]="queryParams | async"
-            class="btn btn-outline-primary">
+        <button *ngIf="outputListEmpty | async;else notEmpty" class="btn btn-outline-primary disabled not-allowed" title="At least 1 output required!">
             Next <span class="fas fa-arrow-right"></span>
-        </a>
+        </button>
+        <ng-template #notEmpty>
+            <a routerLink="/search/result/{{datasetName | async}}" [queryParams]="queryParams | async"
+                class="btn btn-outline-primary">
+                Next <span class="fas fa-arrow-right"></span>
+            </a>
+        </ng-template>
     </div>
 </div>
\ No newline at end of file
diff --git a/src/app/search/containers/output.component.ts b/src/app/search/containers/output.component.ts
index 02d3fc4beaad9ac0020bd04a0a16e7ca9af578e8..249f09917df6ad6f6b3e9ed2587569b162f43b5e 100644
--- a/src/app/search/containers/output.component.ts
+++ b/src/app/search/containers/output.component.ts
@@ -20,7 +20,8 @@ interface StoreState {
 
 @Component({
     selector: 'app-output',
-    templateUrl: 'output.component.html'
+    templateUrl: 'output.component.html',
+    styleUrls: ['output.component.css']
 })
 export class OutputComponent implements OnInit {
     public outputSearchMetaIsLoading: Observable<boolean>;
@@ -39,6 +40,7 @@ export class OutputComponent implements OnInit {
     public criteriaList: Observable<Criterion[]>;
     public outputList: Observable<number[]>;
     public queryParams: Observable<SearchQueryParams>;
+    public outputListEmpty: Observable<boolean>;
 
     constructor(private store: Store<StoreState>, private scrollTopService: ScrollTopService) {
         this.outputSearchMetaIsLoading = store.select(metamodelSelector.getOutputSearchMetaIsLoading);
@@ -57,6 +59,7 @@ export class OutputComponent implements OnInit {
         this.criteriaList = this.store.select(searchSelector.getCriteriaList);
         this.outputList = this.store.select(searchSelector.getOutputList);
         this.queryParams = this.store.select(searchSelector.getQueryParams);
+        this.outputListEmpty = this.store.select(searchSelector.getOutputListEmpty);
     }
 
     ngOnInit() {
@@ -72,4 +75,10 @@ export class OutputComponent implements OnInit {
     updateOutputList(outputList: number[]): void {
         this.store.dispatch(new searchActions.UpdateOutputListAction(outputList));
     }
+
+    emitOutputListEmpty(outputListEmpty: boolean): void {
+        // Create a micro task that is processed after the current synchronous code
+        // This micro task prevent the expression changed after is has been checked error
+        Promise.resolve(null).then(() => this.store.dispatch(new searchActions.OutputListEmptyAction(outputListEmpty)));
+    }
 }
diff --git a/src/app/search/containers/search.component.html b/src/app/search/containers/search.component.html
index 49b935fcfc36d38f85d74845e50b2d8efc340b11..2c70f5b45b48129afc59d58c32798295834eb200 100644
--- a/src/app/search/containers/search.component.html
+++ b/src/app/search/containers/search.component.html
@@ -5,7 +5,8 @@
         [criteriaStepChecked]="criteriaStepChecked | async"
         [outputStepChecked]="outputStepChecked | async"
         [resultStepChecked]="resultStepChecked | async"
-        [queryParams]="queryParams | async">
+        [queryParams]="queryParams | async"
+        [outputListEmpty]="outputListEmpty | async">
     </app-progress-bar>
     <router-outlet></router-outlet>
 </div>
\ No newline at end of file
diff --git a/src/app/search/containers/search.component.ts b/src/app/search/containers/search.component.ts
index 8c1221d52a3c548ed05c83231aa834a42fdfaa6e..0fd226b4c01de545ab9e16324afb2f075e9e5d73 100644
--- a/src/app/search/containers/search.component.ts
+++ b/src/app/search/containers/search.component.ts
@@ -2,7 +2,7 @@ import { Component, } from '@angular/core';
 
 import { Observable } from 'rxjs';
 import { Store } from '@ngrx/store';
-
+import { SearchQueryParams } from '../store/model';
 import * as searchReducer from '../store/search.reducer';
 import * as searchSelector from '../store/search.selector';
 
@@ -16,7 +16,8 @@ export class SearchComponent {
     public criteriaStepChecked: Observable<boolean>;
     public outputStepChecked: Observable<boolean>;
     public resultStepChecked: Observable<boolean>;
-    public queryParams: Observable<any>;
+    public queryParams: Observable<SearchQueryParams>;
+    public outputListEmpty: Observable<boolean>;
 
     constructor(private store: Store<searchReducer.State>) {
         this.currentStep = store.select(searchSelector.getCurrentStep);
@@ -25,5 +26,6 @@ export class SearchComponent {
         this.outputStepChecked = store.select(searchSelector.getOutputStepChecked);
         this.resultStepChecked = store.select(searchSelector.getResultStepChecked);
         this.queryParams = this.store.select(searchSelector.getQueryParams);
+        this.outputListEmpty = this.store.select(searchSelector.getOutputListEmpty);
     }
 }
diff --git a/src/app/search/store/search.action.ts b/src/app/search/store/search.action.ts
index 2a1082dab495d72614f7b0c970a3604b83a408fa..90eac783c805ad630d1d3b927059e3377c076f39 100644
--- a/src/app/search/store/search.action.ts
+++ b/src/app/search/store/search.action.ts
@@ -25,8 +25,10 @@ export const EXECUTE_PROCESS = '[Search] Execute Process';
 export const EXECUTE_PROCESS_WIP = '[Search] Execute Process WIP';
 export const EXECUTE_PROCESS_SUCCESS = '[Search] Execute Process Success';
 export const EXECUTE_PROCESS_FAIL = '[Search] Execute Process Fail';
+export const OUTPUT_LIST_EMPTY = '[Search] Output List Empty';
 export const DESTROY_RESULTS = '[Search] Destroy Results';
 
+
 export class InitSearchByUrl implements Action {
     type = INIT_SEARCH_BY_URL;
 
@@ -166,6 +168,12 @@ export class ExecuteProcessFailAction implements Action {
     constructor(public payload: {} = null) { }
 }
 
+export class OutputListEmptyAction implements Action {
+    type = OUTPUT_LIST_EMPTY;
+
+    constructor(public payload: boolean) { }
+}
+
 export class DestroyResultsAction implements Action {
     type = DESTROY_RESULTS;
 
@@ -196,4 +204,5 @@ export type Actions
     | ExecuteProcessWipAction
     | ExecuteProcessSuccessAction
     | ExecuteProcessFailAction
+    | OutputListEmptyAction
     | DestroyResultsAction;
diff --git a/src/app/search/store/search.reducer.ts b/src/app/search/store/search.reducer.ts
index 0ecb651833a6a5838f1e79f0ae255c361852b366..1b588d5271454a0dee0fc9eacc2b01e439dc950d 100644
--- a/src/app/search/store/search.reducer.ts
+++ b/src/app/search/store/search.reducer.ts
@@ -17,6 +17,7 @@ export interface State {
     processWip: boolean;
     processDone: boolean;
     processId: string;
+    outputListEmpty: boolean;
 }
 
 const initialState: State = {
@@ -33,14 +34,14 @@ const initialState: State = {
     selectedData: [],
     processWip: false,
     processDone: false,
-    processId: null
+    processId: null,
+    outputListEmpty: null
 };
 
 export function reducer(state: State = initialState, action: actions.Actions): State {
     switch (action.type) {
         case actions.CHANGE_STEP:
             const currentStep = action.payload as string;
-
             return {
                 ...state,
                 currentStep
@@ -48,7 +49,6 @@ export function reducer(state: State = initialState, action: actions.Actions): S
 
         case actions.SELECT_DATASET:
             const datasetName = action.payload as string;
-
             return {
                 ...state,
                 pristine: false,
@@ -81,7 +81,6 @@ export function reducer(state: State = initialState, action: actions.Actions): S
 
         case actions.UPDATE_CRITERIA_LIST:
             const criteriaList = action.payload as Criterion[];
-
             return {
                 ...state,
                 criteriaList
@@ -89,7 +88,6 @@ export function reducer(state: State = initialState, action: actions.Actions): S
 
         case actions.ADD_CRITERION:
             const criterion = action.payload as Criterion;
-
             return {
                 ...state,
                 criteriaList: [...state.criteriaList, criterion]
@@ -97,7 +95,6 @@ export function reducer(state: State = initialState, action: actions.Actions): S
 
         case actions.DELETE_CRITERION:
             const id = action.payload as number;
-
             return {
                 ...state,
                 criteriaList: [...state.criteriaList.filter(c => c.id !== id)]
@@ -105,7 +102,6 @@ export function reducer(state: State = initialState, action: actions.Actions): S
 
         case actions.UPDATE_OUTPUT_LIST:
             const outputList = action.payload as number[];
-
             return {
                 ...state,
                 outputList
@@ -113,7 +109,6 @@ export function reducer(state: State = initialState, action: actions.Actions): S
 
         case actions.RETRIEVE_DATA_SUCCESS:
             const searchData = action.payload as any[];
-
             return {
                 ...state,
                 searchData
@@ -121,7 +116,6 @@ export function reducer(state: State = initialState, action: actions.Actions): S
 
         case actions.GET_DATA_LENGTH_SUCCESS:
             const dataLength = action.payload as number;
-
             return {
                 ...state,
                 dataLength
@@ -129,7 +123,6 @@ export function reducer(state: State = initialState, action: actions.Actions): S
 
         case actions.ADD_SELECTED_DATA:
             const addData = action.payload;
-
             return {
                 ...state,
                 selectedData: [...state.selectedData, addData]
@@ -137,7 +130,6 @@ export function reducer(state: State = initialState, action: actions.Actions): S
 
         case actions.DELETE_SELECTED_DATA:
             const deleteData = action.payload;
-
             return {
                 ...state,
                 selectedData: [...state.selectedData.filter(d => d !== deleteData)]
@@ -152,7 +144,6 @@ export function reducer(state: State = initialState, action: actions.Actions): S
 
         case actions.EXECUTE_PROCESS_WIP:
             const processId = action.payload as string;
-
             return {
                 ...state,
                 processId
@@ -172,6 +163,13 @@ export function reducer(state: State = initialState, action: actions.Actions): S
                 processDone: false,
                 processId: null
             };
+        
+        case actions.OUTPUT_LIST_EMPTY:
+            const outputListEmpty = action.payload as boolean;
+            return {
+                ...state,
+                outputListEmpty
+            };
 
         case actions.DESTROY_RESULTS:
             return {
@@ -199,3 +197,4 @@ export const getSelectedData = (state: State) => state.selectedData;
 export const getProcessWip = (state: State) => state.processWip;
 export const getProcessDone = (state: State) => state.processDone;
 export const getProcessId = (state: State) => state.processId;
+export const getOutputListEmpty = (state: State) => state.outputListEmpty;
diff --git a/src/app/search/store/search.selector.ts b/src/app/search/store/search.selector.ts
index 94ffe0be1848843c55bdf9316d99065cf830b23a..5da37d114993bd744f41b2432588640b112058f1 100644
--- a/src/app/search/store/search.selector.ts
+++ b/src/app/search/store/search.selector.ts
@@ -106,3 +106,8 @@ export const getProcessId = createSelector(
     getSearchState,
     search.getProcessId
 );
+
+export const getOutputListEmpty = createSelector(
+    getSearchState,
+    search.getOutputListEmpty
+);
diff --git a/src/styles.css b/src/styles.css
index b3596e114feba7f7b342404c25a8abb3b4c53c79..e8a520362632e26739adb4582bb315586e439790 100644
--- a/src/styles.css
+++ b/src/styles.css
@@ -4,7 +4,6 @@
     color: #7AC29A;
 }
 
-
 /* Custom styles for external library components */
 /* Needs to be in global stylesheet due to ViewEncapsulation */
 .custom-accordion-output .panel-body {