diff --git a/wise-webapp/src/main/java/com/wisemapping/validator/Messages.java b/wise-webapp/src/main/java/com/wisemapping/validator/Messages.java
index 13c96cc4..043eb172 100644
--- a/wise-webapp/src/main/java/com/wisemapping/validator/Messages.java
+++ b/wise-webapp/src/main/java/com/wisemapping/validator/Messages.java
@@ -22,7 +22,6 @@ public interface Messages {
     String EMAIL_ALREADY_EXIST = "EMAIL_ALREADY_EXIST";
     String NO_VALID_EMAIL_ADDRESS = "NO_VALID_EMAIL_ADDRESS";
     String FIELD_REQUIRED = "FIELD_REQUIRED";
-    String IMPORT_MAP_ERROR = "IMPORT_MAP_ERROR";
     String MAP_TITLE_ALREADY_EXISTS = "MAP_TITLE_ALREADY_EXISTS";
     String LABEL_TITLE_ALREADY_EXISTS = "LABEL_TITLE_ALREADY_EXISTS";
     String PASSWORD_MISMATCH = "PASSWORD_MISMATCH";
diff --git a/wise-webapp/src/main/resources/messages_en.properties b/wise-webapp/src/main/resources/messages_en.properties
index f26b8e8f..76adba96 100644
--- a/wise-webapp/src/main/resources/messages_en.properties
+++ b/wise-webapp/src/main/resources/messages_en.properties
@@ -11,7 +11,6 @@ CREATOR=Creator
 WELCOME=Welcome
 SHARE=Share
 UNEXPECTED_ERROR=An unexpected error has occurred.
-IMPORT_MAP_ERROR=FreeMind file could not be imported. {0}
 MAP_TITLE_ALREADY_EXISTS=You have already a map with the same name
 LABEL_TITLE_ALREADY_EXISTS=You have already a label with the same name
 # Properties used on the tutorial mindmap ....
diff --git a/wise-webapp/src/main/webapp/WEB-INF/web.xml b/wise-webapp/src/main/webapp/WEB-INF/web.xml
index 8eb7a18d..c155be16 100644
--- a/wise-webapp/src/main/webapp/WEB-INF/web.xml
+++ b/wise-webapp/src/main/webapp/WEB-INF/web.xml
@@ -1,11 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
-<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
+<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
-         version="2.4">
+         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
+         version="3.1">
 
-    <filter>
+<filter>
         <filter-name>charsetFilter</filter-name>
         <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
         <init-param>