diff --git a/debian/changelog b/debian/changelog
index 87c3203..0509416 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,4 +1,4 @@
-co2monitor (0.0.9) UNRELEASED; urgency=medium
+co2monitor (0.0.9) unstable; urgency=medium
 
   * fix multiple co2monitor-service invocation bug
 
diff --git a/usr/bin/co2monitor-invoker b/usr/bin/co2monitor-invoker
index 44301e4..96bd9d9 100755
--- a/usr/bin/co2monitor-invoker
+++ b/usr/bin/co2monitor-invoker
@@ -130,7 +130,7 @@ else:
 # get DEVNAME environment variable
 DEVNAME = os.environ.get('DEVNAME')
 if not DEVNAME: # stop if there is no devname environment variable
-    logger.critical(_("no DEVNAME environment variable given. Aborting."))
+    logger.info(_("no DEVNAME environment variable given. Nothing more to do."))
     sys.exit(1)
 
 logger.debug(_("DEVNAME environment variable: {}".format(DEVNAME)))
diff --git a/usr/bin/co2monitor-service b/usr/bin/co2monitor-service
index bb5c9a6..c559354 100755
--- a/usr/bin/co2monitor-service
+++ b/usr/bin/co2monitor-service
@@ -45,7 +45,7 @@ systembus = dbus.SystemBus() # the system bus
 
 # co2monitor is already running
 if systembus.name_has_owner(CO2MONITOR_BUSNAME):
-    logger.warning(_("co2monitor is already running. Aborting."))
+    logger.info(_("co2monitor is already running. Aborting."))
     sys.exit()
 
 
diff --git a/usr/share/co2monitor/lang/de/LC_MESSAGES/co2monitor.po b/usr/share/co2monitor/lang/de/LC_MESSAGES/co2monitor.po
index 4200d0e..0a521bb 100644
--- a/usr/share/co2monitor/lang/de/LC_MESSAGES/co2monitor.po
+++ b/usr/share/co2monitor/lang/de/LC_MESSAGES/co2monitor.po
@@ -6,8 +6,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: \n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-11-23 16:15+0100\n"
-"PO-Revision-Date: 2016-11-22 13:56+0100\n"
+"POT-Creation-Date: 2016-11-23 17:30+0100\n"
+"PO-Revision-Date: 2016-11-23 17:36+0100\n"
 "Last-Translator: \n"
 "Language-Team: \n"
 "Language: de\n"
@@ -18,22 +18,6 @@ msgstr ""
 "X-Generator: Poedit 1.8.7.1\n"
 "Plural-Forms: nplurals=2; plural=(n != 1);\n"
 
-#: usr/lib/co2monitor/python/co2monitor/gui.py:76
-msgid "Welcome to Co2monitor!"
-msgstr "Willkommen bei Co2monitor!"
-
-#: usr/lib/co2monitor/python/co2monitor/gui.py:84
-msgid "Starting GLib main loop..."
-msgstr "starte GLib Hautpschleife..."
-
-#: usr/lib/co2monitor/python/co2monitor/gui.py:86
-msgid "GLib main loop ended."
-msgstr "GLib Hauptschleife beendet."
-
-#: usr/lib/co2monitor/python/co2monitor/gui.py:90
-msgid "Received quitting signal."
-msgstr "Anhaltesignal erhalten."
-
 #: usr/lib/co2monitor/python/co2monitor/device.py:31
 msgid "Device file '{}' does not exist."
 msgstr "Gerätedatei '{}' existiert nicht."
@@ -74,6 +58,22 @@ msgstr "Versuche Neuverbindung..."
 msgid "Could not reconnect. Aborting."
 msgstr "Konnte nicht wiederverbinden. Abbruch."
 
+#: usr/lib/co2monitor/python/co2monitor/gui.py:76
+msgid "Welcome to Co2monitor!"
+msgstr "Willkommen bei Co2monitor!"
+
+#: usr/lib/co2monitor/python/co2monitor/gui.py:84
+msgid "Starting GLib main loop..."
+msgstr "starte GLib Hautpschleife..."
+
+#: usr/lib/co2monitor/python/co2monitor/gui.py:86
+msgid "GLib main loop ended."
+msgstr "GLib Hauptschleife beendet."
+
+#: usr/lib/co2monitor/python/co2monitor/gui.py:90
+msgid "Received quitting signal."
+msgstr "Anhaltesignal erhalten."
+
 #: usr/lib/co2monitor/python/co2monitor/service.py:82
 msgid "received stop signal {},"
 msgstr "Anhaltesignal {} erhalten,"
@@ -189,9 +189,8 @@ msgid "Stopped data logging on device {}"
 msgstr "beende Datenaufzeichnung auf Gerät {}"
 
 #: usr/bin/co2monitor-service:48
-#, fuzzy
 msgid "co2monitor is already running. Aborting."
-msgstr "co2monitor läuft bereits"
+msgstr "co2monitor läuft bereits. Abbruch."
 
 #: usr/bin/co2monitor-invoker:84
 msgid "co2monitor is already running"
@@ -240,8 +239,8 @@ msgstr ""
 "funktioniert."
 
 #: usr/bin/co2monitor-invoker:133
-msgid "no DEVNAME environment variable given. Aborting."
-msgstr "keine DEVNAME Umgebungsvariable. Abbruch."
+msgid "no DEVNAME environment variable given. Nothing more to do."
+msgstr "keine DEVNAME Umgebungsvariable. Nichts mehr zu tun."
 
 #: usr/bin/co2monitor-invoker:136
 msgid "DEVNAME environment variable: {}"
diff --git a/usr/share/co2monitor/lang/fr/LC_MESSAGES/co2monitor.po b/usr/share/co2monitor/lang/fr/LC_MESSAGES/co2monitor.po
index b51d493..a88e62e 100644
--- a/usr/share/co2monitor/lang/fr/LC_MESSAGES/co2monitor.po
+++ b/usr/share/co2monitor/lang/fr/LC_MESSAGES/co2monitor.po
@@ -7,8 +7,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: \n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-11-23 16:15+0100\n"
-"PO-Revision-Date: 2016-11-22 13:51+0100\n"
+"POT-Creation-Date: 2016-11-23 17:30+0100\n"
+"PO-Revision-Date: 2016-11-23 17:37+0100\n"
 "Last-Translator: \n"
 "Language-Team: \n"
 "Language: fr_FR\n"
@@ -18,22 +18,6 @@ msgstr ""
 "X-Generator: Poedit 1.8.7.1\n"
 "Plural-Forms: nplurals=2; plural=(n > 1);\n"
 
-#: usr/lib/co2monitor/python/co2monitor/gui.py:76
-msgid "Welcome to Co2monitor!"
-msgstr "Bienvenue à Co2monitor!"
-
-#: usr/lib/co2monitor/python/co2monitor/gui.py:84
-msgid "Starting GLib main loop..."
-msgstr "lance GLib boucle... "
-
-#: usr/lib/co2monitor/python/co2monitor/gui.py:86
-msgid "GLib main loop ended."
-msgstr "GLib boucle terminé."
-
-#: usr/lib/co2monitor/python/co2monitor/gui.py:90
-msgid "Received quitting signal."
-msgstr "reçu signal de interruption."
-
 #: usr/lib/co2monitor/python/co2monitor/device.py:31
 msgid "Device file '{}' does not exist."
 msgstr "Fichier d'appareil '{}' n'existe pas."
@@ -74,6 +58,22 @@ msgstr "Essai de reconnexion..."
 msgid "Could not reconnect. Aborting."
 msgstr "Ne pourrais pas reconnecter. Interruption."
 
+#: usr/lib/co2monitor/python/co2monitor/gui.py:76
+msgid "Welcome to Co2monitor!"
+msgstr "Bienvenue à Co2monitor!"
+
+#: usr/lib/co2monitor/python/co2monitor/gui.py:84
+msgid "Starting GLib main loop..."
+msgstr "lance GLib boucle... "
+
+#: usr/lib/co2monitor/python/co2monitor/gui.py:86
+msgid "GLib main loop ended."
+msgstr "GLib boucle terminé."
+
+#: usr/lib/co2monitor/python/co2monitor/gui.py:90
+msgid "Received quitting signal."
+msgstr "reçu signal de interruption."
+
 #: usr/lib/co2monitor/python/co2monitor/service.py:82
 msgid "received stop signal {},"
 msgstr "reçu signal stop {}"
@@ -188,9 +188,8 @@ msgid "Stopped data logging on device {}"
 msgstr "arrêté enregistrement d'appareil {}"
 
 #: usr/bin/co2monitor-service:48
-#, fuzzy
 msgid "co2monitor is already running. Aborting."
-msgstr "co2monitor marche déja"
+msgstr "co2monitor marche déja. Interruption."
 
 #: usr/bin/co2monitor-invoker:84
 msgid "co2monitor is already running"
@@ -235,8 +234,8 @@ msgstr ""
 "Lancer co2monitor par 'at now' n'a pas marché, ça durait trop longtemps."
 
 #: usr/bin/co2monitor-invoker:133
-msgid "no DEVNAME environment variable given. Aborting."
-msgstr "pas de variable d'environnement DEVNAME. Interruption."
+msgid "no DEVNAME environment variable given. Nothing more to do."
+msgstr "pas de variable d'environnement DEVNAME. Rien à faire."
 
 #: usr/bin/co2monitor-invoker:136
 msgid "DEVNAME environment variable: {}"