--- a/src/eric7/Toolbox/SingleApplication.py	Mon Oct 24 15:12:28 2022 +0200
+++ b/src/eric7/Toolbox/SingleApplication.py	Mon Oct 24 15:52:04 2022 +0200
@@ -99,7 +99,7 @@
         Public method used to shut down the server.
         """
         if self.qsock is not None:
-            self.qsock.readyRead.disconnect(self.__parseLine)
+            self.qsock.readyRead.disconnect(self.__receiveJson)
             self.qsock.disconnected.disconnect(self.__disconnected)
 
         self.qsock = None