diff --git a/src/cutecoin/gui/community_tab.py b/src/cutecoin/gui/community_tab.py
index f49cca282186d63dee0e1bc14236bc486d013f52..d12cd9d0f98b001a75ddfbfbe62710bfe2fb808d 100644
--- a/src/cutecoin/gui/community_tab.py
+++ b/src/cutecoin/gui/community_tab.py
@@ -201,5 +201,8 @@ The process to join back the community later will have to be done again."""
                                      QMessageBox.Ok)
 
     def refresh_person(self, pubkey):
-        index = self.table_community_members.model().sourceModel().person_index(pubkey)
-        self.table_community_members.model().sourceModel().dataChanged.emit(index[0], index[1])
+        if self is None:
+            logging.error("community_tab self is None in refresh_person. Watcher connected to a destroyed tab")
+        else:
+            index = self.table_community_members.model().sourceModel().person_index(pubkey)
+            self.table_community_members.model().sourceModel().dataChanged.emit(index[0], index[1])
diff --git a/src/cutecoin/models/network.py b/src/cutecoin/models/network.py
index eb44fcf652e48a2b53ac48fcc4c8e234b2f87b7a..685d9c8ccdb098cfbb602018ca404eae03a207bb 100644
--- a/src/cutecoin/models/network.py
+++ b/src/cutecoin/models/network.py
@@ -5,8 +5,7 @@ Created on 5 févr. 2014
 '''
 
 import logging
-from ..core.person import Person
-from ..tools.exceptions import PersonNotFoundError
+from ..tools.exceptions import NoPeerAvailable
 from ..core.net.node import Node
 from PyQt5.QtCore import QAbstractTableModel, Qt, QVariant, QSortFilterProxyModel
 from PyQt5.QtGui import QColor
@@ -52,7 +51,7 @@ class NetworkFilterProxyModel(QSortFilterProxyModel):
         source_data = self.sourceModel().data(source_index, role)
         if index.column() == self.sourceModel().column_types.index('is_member') \
          and role == Qt.DisplayRole:
-            value = {True: 'yes', False: 'no'}
+            value = {True: 'yes', False: 'no', None: 'offline'}
             return value[source_data]
         return source_data
 
@@ -100,7 +99,11 @@ class NetworkTableModel(QAbstractTableModel):
         :param ..core.net.node.Node node: Network node
         :return:
         """
-        is_member = node.pubkey in self.community.members_pubkeys()
+        try:
+            is_member = node.pubkey in self.community.members_pubkeys()
+        except NoPeerAvailable as e:
+            logging.error(e)
+            is_member = None
 
         address = ""
         if node.endpoint.server: