diff --git a/.idea/misc.xml b/.idea/misc.xml
index 7d004e3..8c91e35 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -3,7 +3,7 @@
   <component name="JavaScriptSettings">
     <option name="languageLevel" value="ES6" />
   </component>
-  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.8 (revpi)" project-jdk-type="Python SDK" />
+  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.8 (revpipyload)" project-jdk-type="Python SDK" />
   <component name="PythonCompatibilityInspectionAdvertiser">
     <option name="version" value="3" />
   </component>
diff --git a/.idea/revpipyload.iml b/.idea/revpipyload.iml
index 148e432..0dc1149 100644
--- a/.idea/revpipyload.iml
+++ b/.idea/revpipyload.iml
@@ -4,8 +4,9 @@
     <content url="file://$MODULE_DIR$">
       <sourceFolder url="file://$MODULE_DIR$/revpipyload" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/lib" isTestSource="false" />
+      <excludeFolder url="file://$MODULE_DIR$/venv" />
     </content>
-    <orderEntry type="jdk" jdkName="Python 3.8 (revpi)" jdkType="Python SDK" />
+    <orderEntry type="jdk" jdkName="Python 3.8 (revpipyload)" jdkType="Python SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
   </component>
 </module>
\ No newline at end of file
diff --git a/revpipyload/mqttserver.py b/revpipyload/mqttserver.py
index 69c1777..3a97480 100644
--- a/revpipyload/mqttserver.py
+++ b/revpipyload/mqttserver.py
@@ -76,7 +76,8 @@ class MqttServer(Thread):
         self._loadrevpimodio()
 
         # Topics konfigurieren
-        self._basetopic = basetopic
+        self._basetopic = basetopic.strip("/")
+        self._basetopic_len = len(self._basetopic.split("/"))
         self._mqtt_evt_io = join(basetopic, "event/{0}")
         self._mqtt_got_io = join(basetopic, "got/{0}")
         self._mqtt_io = join(basetopic, "io/{0}")
@@ -214,6 +215,8 @@ class MqttServer(Thread):
 
     def _on_message(self, client, userdata, msg):
         """Sendet piCtory Konfiguration."""
+        proginit.logger.debug("Received topic: {0}".format(msg.topic))
+
         if msg.topic == self._mqtt_pictory:
             # piCtory Konfiguration senden
             self._send_pictory_conf()
@@ -226,27 +229,23 @@ class MqttServer(Thread):
             # The I/O name may contain forward slashes. Those look nice on the
             # MQTT bus, but make parsing the topic for actions a bit harder since
             # we cannot simply split the topic and know at what index to find the
-            # action. To find the action we first remove the base topic (keeping
-            # in mind that it may or may not have a trailing / in the
-            # configuration file), determine the I/O action and finally reassemble
-            # the I/O name with slashes.
-
-            lst_topic = msg.topic[len(self._basetopic):]
-            if lst_topic[0] == '/':
-        	    lst_topic = lst_topic[1:]
-            lst_topic = lst_topic.split("/")
-            proginit.logger.error("lst_topic {0}".format(lst_topic))
-
-            if len(lst_topic) < 2:
-                proginit.logger.error("wrong format for topic '{0}', expected '{1}/(get/set/reset)/<ioname>'".format(msg.topic, self._basetopic))
+            # action. To find the action we remove base topic parts to get the
+            # action and finally reassemble the I/O name with slashes.
+            lst_topic = msg.topic.split("/")[self._basetopic_len:]
+            if len(lst_topic) < 2 or lst_topic[0].lower() not in ("get", "set", "reset"):
+                proginit.logger.error(
+                    "wrong format for topic '{0}', expected '{1}/[get|set|reset]/<ioname>'"
+                    "".format(msg.topic, self._basetopic)
+                )
                 return
 
             # Aktion und IO auswerten
-            ioget = lst_topic[0].lower() == "get"
-            ioset = lst_topic[0].lower() == "set"
-            ioreset = lst_topic[0].lower() == "reset"
+            io_action = lst_topic[0].lower()
+            ioget = io_action == "get"
+            ioset = io_action == "set"
+            ioreset = io_action == "reset"
             ioname = '/'.join(lst_topic[1:])
-            coreio = ioname.find(".") != -1
+            coreio = ioname.find("core.") == 0
 
             try:
                 # IO holen
diff --git a/setup.py b/setup.py
index 09abb53..26b1931 100644
--- a/setup.py
+++ b/setup.py
@@ -27,12 +27,13 @@ setup(
 
     license="LGPLv3",
     name="revpipyload",
-    version="0.9.8",
+    version="0.9.8a1",
 
     scripts=[
         "data/revpipyload",
         "data/revpipyload_secure_installation",
     ],
+    packages=[],
 
     install_requires=["revpimodio2 >= 2.5.0"],
     python_requires=">=3.2",