diff --git a/syncplay/client.py b/syncplay/client.py
index 5638eb8..2577c66 100644
--- a/syncplay/client.py
+++ b/syncplay/client.py
@@ -42,7 +42,8 @@ class SyncClientFactory(ClientFactory):
 
     def clientConnectionFailed(self, connector, reason):
         if not self.reconnecting:
-            self._client.ui.showErrorMessage(getMessage("en", "connection-failed-notification"))
+            reactor.callLater(0.1, self._client.ui.showErrorMessage, getMessage("en", "connection-failed-notification"), True)
+            reactor.callLater(0.1, self._client.stop, True)
         else:
             self.clientConnectionLost(connector, reason)
 
@@ -616,6 +617,7 @@ class UiManager(object):
     def __init__(self, client, ui):
         self._client = client
         self.__ui = ui
+        self.lastError = ""
 
     def showMessage(self, message, noPlayer=False, noTimestamp=False):
         if(not noPlayer): self.showOSDMessage(message)
@@ -629,7 +631,9 @@ class UiManager(object):
             self._client._player.displayMessage(message, duration * 1000)
 
     def showErrorMessage(self, message, criticalerror=False):
-        self.__ui.showErrorMessage(message, criticalerror)
+        if message <> self.lastError: # Avoid double call bug
+            self.lastError = message
+            self.__ui.showErrorMessage(message, criticalerror)
 
     def promptFor(self, prompt):
         return self.__ui.promptFor(prompt)
diff --git a/syncplay/players/mpc.py b/syncplay/players/mpc.py
index 7d1793e..21355b1 100644
--- a/syncplay/players/mpc.py
+++ b/syncplay/players/mpc.py
@@ -358,8 +358,8 @@ class MPCHCAPIPlayer(BasePlayer):
     def __dropIfNotSufficientVersion(self):
         self._mpcApi.askForVersion()
         if(not self.__versionUpdate.wait(0.1) or not self._mpcApi.version):
-            self.__mpcError(getMessage("en", "mpc-version-insufficient-error").format(constants.MPC_MIN_VER))
-            self.reactor.callFromThread(self.__client.stop, (True),)
+            self.reactor.callFromThread(self.__client.ui.showErrorMessage, getMessage("en", "mpc-version-insufficient-error").format(constants.MPC_MIN_VER), True)
+            self.reactor.callFromThread(self.__client.stop, True)
             
     def __testMpcReady(self):
         if(not self.__preventAsking.wait(10)):
@@ -372,7 +372,7 @@ class MPCHCAPIPlayer(BasePlayer):
             self.__handleUpdatedFilename()
             self.askForStatus()
         except Exception, err:
-            self.__client.ui.showErrorMessage(err.message)
+            self.reactor.callFromThread(self.__client.ui.showErrorMessage, err.message, True)
             self.reactor.callFromThread(self.__client.stop)
             
     def initPlayer(self, filePath): 
@@ -458,10 +458,6 @@ class MPCHCAPIPlayer(BasePlayer):
             self.__setUpStateForNewlyOpenedFile()
             args = (self._mpcApi.filePlaying, self._mpcApi.fileDuration, self._mpcApi.filePath)
             self.reactor.callFromThread(self.__client.updateFile, *args)
-    
-    def __mpcError(self, err=""):
-        self.__client.ui.showErrorMessage(err)
-        self.reactor.callFromThread(self.__client.stop)
 
     def sendCustomCommand(self, cmd, val):
         self._mpcApi.sendRawCommand(cmd, val)