diff --git a/on_update_failure.sh b/on_update_failure.sh
new file mode 100755
index 0000000..706ff28
--- /dev/null
+++ b/on_update_failure.sh
@@ -0,0 +1,184 @@
+#!/bin/bash
+
+# set -x
+
+#
+#############################################################################
+# Check if the ATBUpdateTool(.service) did not send U0001 (sucess),
+# U0002 (activated) or U0003 (error) to ISMAS, including the case that the
+# tool did not crash or was not killed under other circumstances.
+#
+# This script will be called in the associated atbupdatetool.service (see
+# /lib/systemd/system/atbupdatetool.service).
+#
+###############################################################################
+
+readonly OUT_FILE=/tmp/out.txt
+readonly SCRIPT_NAME=$(basename $0)
+
+if [ -z "$START_DATE" ]
+then
+    START_DATE=$(date +"%Y-%m-%d00:00:00")
+fi
+
+if [ -z "$STOP_DATE" ]
+then
+    STOP_DATE=$(date +"%Y-%m-%d%H:%M:%S")
+fi
+
+echo "EXIT_CODE=$EXIT_CODE"
+echo "SERVICE_RESULT=$SERVICE_RESULT"
+echo "EXIT_STATUS=$EXIT_STATUS"
+echo "START_DATE=$START_DATE"
+echo "STOP_DATE=$STOP_DATE"
+
+
+last_cmd_event () {
+    # output json; look for start of CMD_EVENT; look for }}; extract everything between; finally re-add }}.
+    # could also look for ">>>", but this might change in the future.
+    local json=$(\
+	    journalctl -u atbupdatetool --since="$START_DATE" --until="$STOP_DATE" --output=json-pretty |\
+	    grep "#M=APISM#C=CMD_EVENT#J="                                                              |\
+	    awk '{split($0, a, "#M=APISM#C=CMD_EVENT#J="); print a[2]}'                                 |\
+	    awk '{split($0, a, /\}[\s]*\}/); print a[1]}'                                               |\
+	    tr -d '\\'                                                                                  |\
+	    tail -1)
+    json+="}}"
+    echo "$json"
+}
+
+last_percent_value () {
+    echo $(cat $OUT_FILE | sed -n "s/\(^.*\)\(\"PERCENT\"\\s*:\)\(\\s*[0-9]\+\)\(.*$\)/\3/p" | xargs | awk '{print $NF}')
+}
+
+last_step () {
+    echo $(cat $OUT_FILE | sed -n "s/\(^.*\)\(\"PERCENT\"\\s*:\)\(\\s*[0-9]\+\)\(.*$\)/\1\2\3\4/p" | tail -1 | awk '{split($0, a, ","); print a[8]}' | awk '{split($0, b, " : "); print b[2]}' | tr -d '"\\')
+}
+
+last_step_result () {
+    echo $(cat $OUT_FILE | sed -n "s/\(^.*\)\(\"PERCENT\"\\s*:\)\(\\s*[0-9]\+\)\(.*$\)/\1\2\3\4/p" | tail -1 | awk '{split($0, a, ","); print a[9]}' | awk '{split($0, b, " : "); print b[2]}' | tr -d '"\\')
+}
+
+pid_atbupdatetool () {
+    echo $(cat $OUT_FILE | sed -n "s/\(^.*\)\(ATBUpdateTool\[\)\(\\s*[0-9]\+\)\(\].*$\)/\3/p" | uniq)
+}
+
+last_event () {
+    echo $(cat $OUT_FILE | sed -n "s/\(^.*\)\(\"PERCENT\"\\s*:\)\(\\s*[0-9]\+\)\(.*$\)/\1\2\3\4/p" | tail -1 | awk '{split($0, a, ","); print a[4]}' | awk '{split($0, b, ":"); print b[2]}' | tr -d ' ' | tr -d '"\\') 
+}
+
+sendU0003 () {
+    LAST_CMD_EVENT=$(last_cmd_event)
+    echo "LAST=$LAST_CMD_EVENT"
+    
+    local json_detected=0
+    local temp
+    local x
+
+    if [[ ! -z "$LAST_CMD_EVENT" ]]
+    then
+       temp=$(mktemp -p /tmp)
+       echo "$LAST_CMD_EVENT" > "$temp"
+       x=$(jq .EVENT $temp)
+       if [ $? -eq 0 ]; then
+           json_detected=1
+       fi
+    fi
+
+    if [ $json_detected -eq 1 ]
+    then
+        # local pid=$(jq .EVENT_ID $temp)
+
+	# if json has been detected, use "jq".
+
+        x=$(jq .PARAMETER.PERCENT $temp | tr -d '"')
+        [[ -z "$x" ]] && PERCENT=0 || PERCENT=$x
+
+        x=$(jq .PARAMETER.STEP $temp | tr -d '"')
+        [[ -z "$x" ]] && STEP="unknown" || STEP="$x"
+       
+        x=$(jq .PARAMETER.STEP_RESULT $temp | tr -d '"')
+        [[ -z "$x" ]] && STEP_RESULT="unknown" || STEP_RESULT="$x"
+    
+        x=$(pid_atbupdatetool)
+        [[ -z "$x" ]] && PID=99999 || PID=$x
+    
+        x=$(last_event)
+        [[ -z "$x" ]] && EVENT="unknown" || EVENT="$x"
+    
+    else 
+        # cannot parse valid json. try original journal text file.
+
+        x=$(last_percent_value)
+        [[ -z "$x" ]] && PERCENT=0 || PERCENT=$x
+
+        x=$(last_step)
+        [[ -z "$x" ]] && STEP="unknown" || STEP="$x"
+    
+        x=$(last_step_result)
+        [[ -z "$x" ]] && STEP_RESULT="unknown" || STEP_RESULT="$x"
+    
+        x=$(pid_atbupdatetool)
+        [[ -z "$x" ]] && PID=99999 || PID=$x
+
+        x=$(last_event)
+        [[ -z "$x" ]] && EVENT="unknown" || EVENT="$x"
+    fi
+
+    echo "PERCENT=$PERCENT"
+    echo "STEP=$STEP"
+    echo "STEP_RESULT=$STEP_RESULT"
+    echo "PID=$PID"
+    echo "EVENT=$EVENT"
+
+    # build json to be sent to ISMAS with "U0003"
+
+    CURRENT_DATE=$(date +"%Y-%m-%d %H:%M:%S.000%z")
+    U0003Msg="{\
+        \"REASON\":\"SW_UP\",\
+        \"TIMESTAMP\":\"$CURRENT_DATE\",\
+        \"EVENT_ID\":\"$PID\",\
+        \"EVENT\":\"U0003\",\
+        \"EVENTSTATE\":1,\
+        \"PARAMETER\": {\
+            \"PERCENT\" : $PERCENT,\
+            \"RESULTCODE\" : 99,\
+                    \"STEP\" : \"$1 -> monitored last step: $STEP\",\
+                    \"STEP_RESULT\" : \"$1 -> monitored last step result: $STEP_RESULT\",\
+            \"VERSION\" : \"\"\
+        }\
+    }"
+
+    echo -e "U0003Msg=$U0003Msg"
+
+    (echo "#M=APISM#C=CMD_EVENT#J=$U0003Msg"; sleep 5) | nc localhost 7777
+}
+
+# save journal for the last run of atbupdatetool in $OUT_FILE
+echo $(journalctl -u atbupdatetool --since="$START_DATE" --until=$STOP_DATE) > $OUT_FILE
+
+if [[ "$EXIT_CODE" = "exited" && "$SERVICE_RESULT" = "success" && "$EXIT_STATUS" = "0" ]]
+then
+    # almost normal run; at least there was no crash.	
+    if cat $OUT_FILE | grep -o "U0003" | wc -l; then
+        echo "$SCRIPT_NAME: Failure code U0003 already sent to ISMAS"
+        exit 0
+    fi
+
+    if cat $OUT_FILE | grep -o "U0002" | wc -l; then
+        echo "$SCRIPT_NAME: Success code U0002 already sent to ISMAS"
+        exit 0
+    else
+        sendU0003 "$SCRIPT_NAME: Success code U0002 not sent to ISMAS"
+    fi
+
+    if cat $OUT_FILE | grep -o "U0001" | wc -l; then
+        echo "$SCRIPT_NAME: Success code U0001 already sent to ISMAS"
+        exit 0
+    else
+        sendU0003 "$SCRIPT_NAME: Success code U0001 not sent to ISMAS"
+    fi
+else
+    # something unexpected has happened.
+    sendU0003 "$SCRIPT_NAME: EXIT_CODE=$EXIT_CODE;SERVICE_RESULT=$SERVICE_RESULT;EXIT_STATUS=$EXIT_STATUS"
+fi