diff --git a/modules/invoiceOut/back/methods/invoiceOut/downloadZip.js b/modules/invoiceOut/back/methods/invoiceOut/downloadZip.js
index 65f1f8a955..834d3c0318 100644
--- a/modules/invoiceOut/back/methods/invoiceOut/downloadZip.js
+++ b/modules/invoiceOut/back/methods/invoiceOut/downloadZip.js
@@ -1,5 +1,6 @@
 const JSZip = require('jszip');
 const fs = require('fs-extra');
+const UserError = require('vn-loopback/util/user-error');
 
 module.exports = Self => {
     Self.remoteMethodCtx('downloadZip', {
@@ -34,7 +35,7 @@ module.exports = Self => {
         let totalSize = 0;
         const zipConfig = await models.ZipConfig.findOne();
         for (let id of ids) {
-            if (zipConfig && totalSize > zipConfig.maxSize) return false;
+            if (zipConfig && totalSize > zipConfig.maxSize) throw new UserError('Files are too large');
             const invoiceOutPdf = await models.InvoiceOut.download(ctx, id, myOptions);
             const fileName = extractFileName(invoiceOutPdf[2]);
             const body = invoiceOutPdf[0];
diff --git a/modules/invoiceOut/front/index/index.js b/modules/invoiceOut/front/index/index.js
index f1d849710b..a460600739 100644
--- a/modules/invoiceOut/front/index/index.js
+++ b/modules/invoiceOut/front/index/index.js
@@ -1,6 +1,5 @@
 import ngModule from '../module';
 import Section from 'salix/components/section';
-const UserError = require('vn-loopback/util/user-error');
 
 export default class Controller extends Section {
     get checked() {
@@ -35,7 +34,6 @@ export default class Controller extends Section {
             };
             this.$http.post(`InvoiceOuts/downloadZip`, params)
                 .then(res => {
-                    if (res.data == false) throw new UserError('Files are too large');
                     location.href = 'data:application/zip;base64,' + res.data;
                 });
         }