diff --git a/qt6-after/qt6-migrated-legatus/TetraIF/LogView/LogViewModels.cpp b/qt6-after/qt6-migrated-legatus/TetraIF/LogView/LogViewModels.cpp
index 7ba669ece..6e444b569 100644
--- a/qt6-after/qt6-migrated-legatus/TetraIF/LogView/LogViewModels.cpp
+++ b/qt6-after/qt6-migrated-legatus/TetraIF/LogView/LogViewModels.cpp
@@ -298,7 +298,10 @@ void TelegramProxyModel::setFilterByEquipmentIds(bool bFilterByEquipmentIds)
   if (m_bFilterByEquipmentIds == bFilterByEquipmentIds)
     return;
   m_bFilterByEquipmentIds = bFilterByEquipmentIds;
-  invalidateFilter();
+  // invalidateFilter() is deprecated in Qt6 - begin/endFilterChange() is the
+  // documented replacement (re-filters the model)
+  beginFilterChange();
+  endFilterChange();
 }
 
 
@@ -307,7 +310,10 @@ void TelegramProxyModel::setAllowedEquipmentIds(const std::set<int> &allowedEqui
   if (m_allowedEquipmentIds == allowedEquipmentIds)
     return;
   m_allowedEquipmentIds = allowedEquipmentIds;
-  invalidateFilter();
+  // invalidateFilter() is deprecated in Qt6 - begin/endFilterChange() is the
+  // documented replacement (re-filters the model)
+  beginFilterChange();
+  endFilterChange();
 }
 
 
@@ -316,7 +322,10 @@ void TelegramProxyModel::setFilteredCentralTelegramIds(const std::set<int> &filt
   if (m_filteredCentralTelegramIds == filteredCentralTelegramIds)
     return;
   m_filteredCentralTelegramIds = filteredCentralTelegramIds;
-  invalidateFilter();
+  // invalidateFilter() is deprecated in Qt6 - begin/endFilterChange() is the
+  // documented replacement (re-filters the model)
+  beginFilterChange();
+  endFilterChange();
 }
 
 
@@ -325,7 +334,10 @@ void TelegramProxyModel::setFilteredTetraTelegramIds(const std::set<int> &filter
   if (m_filteredTetraTelegramIds == filteredTetraTelegramIds)
     return;
   m_filteredTetraTelegramIds = filteredTetraTelegramIds;
-  invalidateFilter();
+  // invalidateFilter() is deprecated in Qt6 - begin/endFilterChange() is the
+  // documented replacement (re-filters the model)
+  beginFilterChange();
+  endFilterChange();
 }
 
 
@@ -334,7 +346,10 @@ void TelegramProxyModel::setFilteredWlsTelegramIds(const std::set<int> &filtered
   if (m_filteredWlsTelegramIds == filteredWlsTelegramIds)
     return;
   m_filteredWlsTelegramIds = filteredWlsTelegramIds;
-  invalidateFilter();
+  // invalidateFilter() is deprecated in Qt6 - begin/endFilterChange() is the
+  // documented replacement (re-filters the model)
+  beginFilterChange();
+  endFilterChange();
 }
 
 
@@ -350,7 +365,10 @@ void TelegramProxyModel::setFilterCentralTelegrams(N_CoPrtCnv::CoPrtCnvLogHeader
   if (curFilter == m_filterCentralTelegrams)
     return;
   m_filterCentralTelegrams = curFilter;
-  invalidateFilter();
+  // invalidateFilter() is deprecated in Qt6 - begin/endFilterChange() is the
+  // documented replacement (re-filters the model)
+  beginFilterChange();
+  endFilterChange();
 }
 
 
@@ -365,7 +383,10 @@ void TelegramProxyModel::setFilterTetraTelegrams(N_CoPrtCnv::CoPrtCnvLogHeader::
   if (curFilter == m_filterTetraTelegrams)
     return;
   m_filterTetraTelegrams = curFilter;
-  invalidateFilter();
+  // invalidateFilter() is deprecated in Qt6 - begin/endFilterChange() is the
+  // documented replacement (re-filters the model)
+  beginFilterChange();
+  endFilterChange();
 }
 
 
@@ -380,7 +401,10 @@ void TelegramProxyModel::setFilterTetraPDU(N_CoPrtCnv::CoPrtCnvRadioTelegram::E_
   if (curFilter == m_filterTetraPDU)
     return;
   m_filterTetraPDU = curFilter;
-  invalidateFilter();
+  // invalidateFilter() is deprecated in Qt6 - begin/endFilterChange() is the
+  // documented replacement (re-filters the model)
+  beginFilterChange();
+  endFilterChange();
 }
 
 void TelegramProxyModel::setFilterWlsTelegrams(N_CoPrtCnv::CoPrtCnvLogHeader::E_CoPrtCnvProtocol direction,
@@ -394,7 +418,10 @@ void TelegramProxyModel::setFilterWlsTelegrams(N_CoPrtCnv::CoPrtCnvLogHeader::E_
   if (curFilter == m_filterWlsTelegrams)
     return;
   m_filterWlsTelegrams = curFilter;
-  invalidateFilter();
+  // invalidateFilter() is deprecated in Qt6 - begin/endFilterChange() is the
+  // documented replacement (re-filters the model)
+  beginFilterChange();
+  endFilterChange();
 }
 
 
@@ -403,7 +430,10 @@ void TelegramProxyModel::setFilterTetraLogin(bool bFilter)
   if (m_bFilterLoginTelegrams == bFilter)
     return;
   m_bFilterLoginTelegrams = bFilter;
-  invalidateFilter();
+  // invalidateFilter() is deprecated in Qt6 - begin/endFilterChange() is the
+  // documented replacement (re-filters the model)
+  beginFilterChange();
+  endFilterChange();
 }
 
 
@@ -412,7 +442,10 @@ void TelegramProxyModel::setFilterTetraFragmented(bool bFilter)
   if (m_bFilterFragmentedTelegrams == bFilter)
     return;
   m_bFilterFragmentedTelegrams = bFilter;
-  invalidateFilter();
+  // invalidateFilter() is deprecated in Qt6 - begin/endFilterChange() is the
+  // documented replacement (re-filters the model)
+  beginFilterChange();
+  endFilterChange();
 }
 
 
diff --git a/qt6-after/qt6-migrated-legatus/TetraIF/LogView/LogViewTelegramEdit.cpp b/qt6-after/qt6-migrated-legatus/TetraIF/LogView/LogViewTelegramEdit.cpp
index 1927856a6..cde907d8f 100644
--- a/qt6-after/qt6-migrated-legatus/TetraIF/LogView/LogViewTelegramEdit.cpp
+++ b/qt6-after/qt6-migrated-legatus/TetraIF/LogView/LogViewTelegramEdit.cpp
@@ -43,7 +43,6 @@ QString TelegramEdit::s_TELEGRAMLIST_FILES()
 
 TelegramEdit::TelegramEdit(QWidget *parent)
   : QObject(parent)
-  , m_logger(getLogger("LogViewTelegramEdit"))
   , m_addTeleAction(new QAction(QIcon(QLatin1String(":icons/16x16/list-add.png")), tr("Add Telegram"), this))
   , m_editTeleAction(new QAction(QIcon(QLatin1String(":/image/Edit.png")), tr("Edit Telegram"), this))
   , m_copyTeleAction(new QAction(QIcon(QLatin1String(":icons/16x16/edit-copy.png")), tr("Copy Telegram"), this))
@@ -58,6 +57,7 @@ TelegramEdit::TelegramEdit(QWidget *parent)
   , m_DoLoop(false)
   , m_InjectionThread(nullptr)
   , m_EditModel(new TelegramEditModel(this))
+  , m_logger(getLogger("LogViewTelegramEdit"))
 {
   m_addTeleAction->setShortcut(tr("Ctrl+A"));
   m_editTeleAction->setShortcut(tr("Ctrl+E"));
@@ -451,7 +451,7 @@ void TelegramEdit::saveTelegramList()
 
     
     QFile telegramFile(newFilename);
-    telegramFile.open(QIODevice::WriteOnly);
+    (void)telegramFile.open(QIODevice::WriteOnly);
     QDataStream stream(&telegramFile);
 
     
@@ -515,7 +515,7 @@ void TelegramEdit::loadTelegramList(bool checkAppend)
 
     
     QFile telegramFile(newFilename);
-    telegramFile.open(QIODevice::ReadOnly);
+    (void)telegramFile.open(QIODevice::ReadOnly);
     QDataStream stream(&telegramFile);
 
     
diff --git a/qt6-after/qt6-migrated-legatus/TetraIF/PrtCnv/PrtCnvBroadcastMgr.cpp b/qt6-after/qt6-migrated-legatus/TetraIF/PrtCnv/PrtCnvBroadcastMgr.cpp
index 07832bb3a..3b897c195 100644
--- a/qt6-after/qt6-migrated-legatus/TetraIF/PrtCnv/PrtCnvBroadcastMgr.cpp
+++ b/qt6-after/qt6-migrated-legatus/TetraIF/PrtCnv/PrtCnvBroadcastMgr.cpp
@@ -35,8 +35,8 @@ PrtCnvBroadcastMgr::PrtCnvBroadcastMgr() : m_ClaimWindow(0)
   , m_IsFullLoad(false)
   , m_FinishedBroadcastIndex(0)
   , m_FirstBroadcastIndexOfBc1(0)
-  , m_loggerBcRequest(getLogger("PrtCnvBroadcastMgr.BcRequest"))
   , m_logger(getLogger("PrtCnvBroadcastMgr"))
+  , m_loggerBcRequest(getLogger("PrtCnvBroadcastMgr.BcRequest"))
 {
 }
 
diff --git a/qt6-after/qt6-migrated-legatus/TetraIF/PrtCnv/PrtCnvCentralThread.cpp b/qt6-after/qt6-migrated-legatus/TetraIF/PrtCnv/PrtCnvCentralThread.cpp
index 15ec28de2..c09d83d70 100644
--- a/qt6-after/qt6-migrated-legatus/TetraIF/PrtCnv/PrtCnvCentralThread.cpp
+++ b/qt6-after/qt6-migrated-legatus/TetraIF/PrtCnv/PrtCnvCentralThread.cpp
@@ -386,6 +386,8 @@ void PrtCnvCentralThread::handleTelegram(N_CoPrtCnv::CoPrtCnvCentralTelegram *a_
           Q_ASSERT(false);  
           break;
         case AreaEffectSimulationType::BeStillWarning:
+        case AreaEffectSimulationType::DangerZoneExplosion:
+        case AreaEffectSimulationType::AirSupport:
           break;
         }
       }
diff --git a/qt6-after/qt6-migrated-legatus/TetraIF/PrtCnv/PrtCnvMain.cpp b/qt6-after/qt6-migrated-legatus/TetraIF/PrtCnv/PrtCnvMain.cpp
index 627585784..32a5f65bf 100644
--- a/qt6-after/qt6-migrated-legatus/TetraIF/PrtCnv/PrtCnvMain.cpp
+++ b/qt6-after/qt6-migrated-legatus/TetraIF/PrtCnv/PrtCnvMain.cpp
@@ -65,9 +65,12 @@ static void daemonize()
   }
 
   
-  freopen( "/dev/null", "r", stdin);
-  freopen( "/dev/null", "w", stdout);
-  freopen( "/dev/null", "w", stderr);
+  if (freopen( "/dev/null", "r", stdin ) == nullptr
+      || freopen( "/dev/null", "w", stdout ) == nullptr
+      || freopen( "/dev/null", "w", stderr ) == nullptr)
+  {
+    exit(EXIT_FAILURE);
+  }
 #endif
 }