diff --git a/update_psa b/update_psa
index 24fe212..3bfef46 100755
--- a/update_psa
+++ b/update_psa
@@ -14,10 +14,10 @@
 # ./update_psa --file $PWD/update_psa.conf --wdir $PWD
 #
 ###############################################################################
-if [ $# -eq 0 ]; then
+# if [ $# -eq 0 ]; then
     # no parameters given -> nothing to do
-    exit 0
-fi
+#    exit 0
+#fi
 
 if [ -z $IFS ]; then
     IFS=$'\n'
@@ -59,24 +59,27 @@ while test $# -gt 0; do
     shift
 done
 
-source ./update_psa_impl
+if cd "$WORKING_DIRECTORY"; then
+    source ./update_psa_impl
 
-if read_config
-then
-    if clone_customer_repository $CUSTOMER_REPOSITORY_PATH
-    then 
-        check_sanity_of_repository
+    if read_config
+    then
+        if clone_customer_repository ${CUSTOMER_REPOSITORY_PATH}
+	then 
+            check_sanity_of_repository
 
-        #set_updates_available
-        #while :
-        #do
-        #    sleep 5
-        #    updates_available && break
-        #done 
+            #set_updates_available
+            #while :
+            #do
+            #    sleep 5
+            #    updates_available && break
+            #done 
 
-        update_psa
+            update_psa
+        fi
     fi
+    exit $EXIT_CODE
 fi
 
-exit $EXIT_CODE
+exit -1
 ###############################################################################