Fix for #514

src/app/components/project-map/context-menu/actions/duplicate-action/duplicate-action.component.ts

@@ -45,7 +45,9 @@ export class DuplicateActionComponent {
             })
         }
 
+        if (runningNodes.length > 0) {
             runningNodes = runningNodes.substring(0, runningNodes.length-2);
             this.toasterService.error(`Cannot duplicate node data for nodes: ${runningNodes}`);
         }
+    }
 }