diff --git a/src/main/java/de/hsel/spm/baudas/web/UploadServlet.java b/src/main/java/de/hsel/spm/baudas/web/UploadServlet.java
index 3f09c45..dacf593 100644
--- a/src/main/java/de/hsel/spm/baudas/web/UploadServlet.java
+++ b/src/main/java/de/hsel/spm/baudas/web/UploadServlet.java
@@ -60,6 +60,7 @@ public class UploadServlet extends HttpServlet {
     protected void doPost(@NotNull HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
         req.setCharacterEncoding(StandardCharsets.UTF_8.name());
 
+
         Part filePart = req.getPart("file");
 
         if (filePart == null) {
@@ -113,7 +114,7 @@ public class UploadServlet extends HttpServlet {
      */
     private void error(@NotNull HttpServletResponse response, @NotNull ErrorCode code) {
         try {
-            response.sendRedirect("error.jsp?code=" + code);
+            response.getWriter().write(code.getMessage());
         } catch (IOException e) {
             BauDas.getLogger().throwing(this.getClass().getName(), this.getClass().getEnclosingMethod().getName(), e);
         }
diff --git a/src/main/webapp/error.jsp b/src/main/webapp/error.jsp
deleted file mode 100644
index a137dce..0000000
--- a/src/main/webapp/error.jsp
+++ /dev/null
@@ -1,32 +0,0 @@
-<%@ page import="de.hsel.spm.baudas.web.ErrorCode" %>
-<%@ page import="java.nio.charset.StandardCharsets" %>
-<%@ page import="java.util.List" %>
-<%@ page import="java.util.Arrays" %>
-<%@ page import="java.util.ArrayList" %>
-<%@ page contentType="text/html;charset=UTF-8" %>
-<%@include file="emptyHeader.jsp"%>
-<% response.setCharacterEncoding(StandardCharsets.UTF_8.name()); %>
-<% request.setCharacterEncoding(StandardCharsets.UTF_8.name()); %>
-
-<%
-    String code = request.getParameter("code");
-
-    if(code != null && ErrorCode.exists(code)){
-        ErrorCode errorCode = ErrorCode.valueOf(code);
-%>
-
-<div class="row">
-    <div class="col s4 push-s4">
-        <div class="card-panel red darken-1">
-        <h5 class="white-text center-align">
-            <%= errorCode.getMessage()%>
-        </h5>
-        </div>
-    </div>
-</div>
-<%
-    }
-%>
-
-
-<%@include file="theming.jsp"%>
\ No newline at end of file
diff --git a/src/main/webapp/js/upload.js b/src/main/webapp/js/upload.js
index 03c1f39..5c187d0 100644
--- a/src/main/webapp/js/upload.js
+++ b/src/main/webapp/js/upload.js
@@ -7,6 +7,7 @@
  */
 
 let form = document.getElementById("upload");
+let error = $('#error');
 
 form.onsubmit = function (event) {
     event.preventDefault();
@@ -22,6 +23,17 @@ form.onsubmit = function (event) {
         loading.modal('open');
     };
 
+    xhr.onreadystatechange = function() {
+        if (xhr.readyState == XMLHttpRequest.DONE) {
+            if(xhr.responseText != null) {
+                loading.modal('close');
+                console.log(xhr.responseText);
+                $('#error-message').text(xhr.responseText);
+                error.modal('open');
+            }
+        }
+    }
+
     xhr.onloadend = function (e) {
         clearSelected();
         updateDatasets();
diff --git a/src/main/webapp/menu.jsp b/src/main/webapp/menu.jsp
index d222eb7..9b7d49f 100644
--- a/src/main/webapp/menu.jsp
+++ b/src/main/webapp/menu.jsp
@@ -144,6 +144,16 @@
     <div class="modal-footer">
 
     </div>
+
+    <div id="error" class="modal">
+        <div class="modal-content">
+            <h4>Es ist ein Fehler aufgetreten</h4>
+            <p id="error-message">A bunch of text</p>
+        </div>
+        <div class="modal-footer">
+            <a href="#!" class="modal-close waves-effect waves-green btn-flat">Ok</a>
+        </div>
+    </div>
 </div>