diff -r 27f636beebad -r 2c730d5fd177 eric6/Toolbox/SingleApplication.py --- a/eric6/Toolbox/SingleApplication.py Mon Mar 01 17:48:43 2021 +0100 +++ b/eric6/Toolbox/SingleApplication.py Tue Mar 02 17:17:09 2021 +0100 @@ -152,7 +152,7 @@ return 1 else: err = self.sock.error() - if err == QLocalSocket.ServerNotFoundError: + if err == QLocalSocket.LocalSocketError.ServerNotFoundError: return 0 else: return -err