diff --git a/smartgears/dataminer_app/tasks/dataminer-app.yml b/smartgears/dataminer_app/tasks/dataminer-app.yml
index 5da3640..767448c 100644
--- a/smartgears/dataminer_app/tasks/dataminer-app.yml
+++ b/smartgears/dataminer_app/tasks/dataminer-app.yml
@@ -11,7 +11,7 @@
     - dataminer_app_upgrade
   tags: [ 'tomcat', 'dataminer', 'wps' ]
 
-# This is only needed to force an upgrade
+# This is only needed to force an upgrade of the algorithm importer script 
 - block:
     - name: Remove the old dataminer algorithm installer to force an upgrade
       file: path={{ smartgears_user_home }}/algorithmInstaller state=absent
@@ -40,6 +40,7 @@
   
     - name: Unarchive the dataminer_wps war
       unarchive: copy=no src={{ smartgears_downloads_dir }}/{{ dataminer_wps_file }} dest={{ smartgears_instance_path }}/webapps/{{ dataminer_wps_name }} creates='{{ smartgears_instance_path }}/webapps/{{ dataminer_wps_name }}/WEB-INF/lib'
+      register: dataminer_updated
       notify: Restart smartgears
 
     - name: Install the dataminer web.xml
@@ -116,16 +117,14 @@
       template: src=wps-config-fixer.j2 dest=/usr/local/bin/wps-config-fixer owner=root group=root mode=0555
       with_items: '{{ tomcat_m_instances }}'
 
-    - name: Remove the catalina additional configuration
-      #template: src={{ dataminer_wps_name }}.xml.j2 dest={{ item.instance_path }}/conf/Catalina/localhost/{{ dataminer_wps_name }}.xml
-      file: dest={{ item.instance_path }}/conf/Catalina/localhost/{{ dataminer_wps_name }}.xml state=absent
-      with_items: '{{ tomcat_m_instances }}'
-      notify: Restart smartgears
-
     - name: Fix the WPS config file
       shell: /usr/local/bin/wps-config-fixer
 #      notify: Restart smartgears
 
+    - name: Remove the file that lists the installed algorithms, after an upgrade
+      file: dest={{ smartgears_user_home }}/wps_algorithms_install_log/already_installed_algorithms.txt state=absent 
+      when: dataminer_updated is changed 
+
     - name: Install the nscd service to work around dns timeouts
       become_user: root 
       apt: pkg=nscd state=present update_cache=yes cache_valid_time=1800
diff --git a/smartgears/dataminer_app/templates/algorithms-updater.j2 b/smartgears/dataminer_app/templates/algorithms-updater.j2
index 2c07d09..1cd861e 100644
--- a/smartgears/dataminer_app/templates/algorithms-updater.j2
+++ b/smartgears/dataminer_app/templates/algorithms-updater.j2
@@ -42,10 +42,10 @@ create_log_dir() {
 
  check_lock_file() {
     # Create the lock file
-    if [ -f $LOCK_FILE ] ; then
+    if [ -f "$LOCK_FILE" ] ; then
         set +o pipefail
         set +e
-        OLDPROC=$( cat $LOCK_FILE )
+        OLDPROC=$( cat "$LOCK_FILE" )
         OLDPROC_RUNNING=$( ps auwwx |  grep -v grep | grep $OLDPROC  | awk '{ print $2 }' )
         RUNNING_JOB_RETVAL=$?
         if [ ! -z "$OLDPROC_RUNNING" ] ; then
@@ -69,7 +69,7 @@ create_log_dir() {
     fi
     set -o pipefail
     set -e
-    echo "$PROCNUM" > $LOCK_FILE
+    echo "$PROCNUM" > "$LOCK_FILE"
 }
 
 update_svn_repo() {
@@ -209,8 +209,14 @@ create_log_dir
 check_lock_file
 update_svn_repo
 if [ $SVN_UPDATE_STATUS -ne 0 ] ; then
-    logger "algorithms-updater: nothing new to from SVN, exiting."
-    cleanup 0
+    if [ -d "${LOG_DIR}" ] ; then
+        if [ ! -f "$ALGORITHMS_INSTALLED_FILE" ] ; then
+                logger "algorithms-updater: nothing new to from SVN but the file that lists the installed algorithms does not exist. We are going to reinstall all the algorithms."
+            else
+                logger "algorithms-updater: nothing new to from SVN, exiting."
+                cleanup 0
+        fi 
+    fi
 fi
 sort_installed_algo_file
 algorithms_updater