diff --git a/tool/CommandFoeRead.cpp b/tool/CommandFoeRead.cpp
index f17e3f46..bb329561 100644
--- a/tool/CommandFoeRead.cpp
+++ b/tool/CommandFoeRead.cpp
@@ -1,6 +1,6 @@
 /*****************************************************************************
  *
- *  Copyright (C) 2006-2009  Florian Pose, Ingenieurgemeinschaft IgH
+ *  Copyright (C) 2006-2024  Florian Pose, Ingenieurgemeinschaft IgH
  *
  *  This file is part of the IgH EtherCAT Master.
  *
@@ -81,7 +81,7 @@ void CommandFoeRead::execute(const StringVector &args)
     }
 
     MasterDevice m(getSingleMasterIndex());
-    m.open(MasterDevice::Read);
+    m.open(MasterDevice::ReadWrite);
     slaves = selectedSlaves(m);
 
     if (slaves.size() != 1) {
diff --git a/tool/CommandGraph.cpp b/tool/CommandGraph.cpp
index 1e3745de..4aa2bb88 100644
--- a/tool/CommandGraph.cpp
+++ b/tool/CommandGraph.cpp
@@ -1,6 +1,6 @@
 /*****************************************************************************
  *
- *  Copyright (C) 2006-2009  Florian Pose, Ingenieurgemeinschaft IgH
+ *  Copyright (C) 2006-2024  Florian Pose, Ingenieurgemeinschaft IgH
  *
  *  This file is part of the IgH EtherCAT Master.
  *
@@ -126,7 +126,7 @@ void CommandGraph::execute(const StringVector &args)
     }
 
     MasterDevice m(getSingleMasterIndex());
-    m.open(MasterDevice::Read);
+    m.open(MasterDevice::ReadWrite);
     m.getMaster(&master);
 
     for (unsigned int i = 0; i < master.slave_count; i++) {
diff --git a/tool/CommandRegRead.cpp b/tool/CommandRegRead.cpp
index b5ed2ebf..c3595389 100644
--- a/tool/CommandRegRead.cpp
+++ b/tool/CommandRegRead.cpp
@@ -1,6 +1,6 @@
 /*****************************************************************************
  *
- *  Copyright (C) 2006-2012  Florian Pose, Ingenieurgemeinschaft IgH
+ *  Copyright (C) 2006-2024  Florian Pose, Ingenieurgemeinschaft IgH
  *
  *  This file is part of the IgH EtherCAT Master.
  *
@@ -134,7 +134,7 @@ void CommandRegRead::execute(const StringVector &args)
     }
 
     MasterDevice m(getSingleMasterIndex());
-    m.open(MasterDevice::Read);
+    m.open(MasterDevice::ReadWrite);
     slaves = selectedSlaves(m);
 
     if (slaves.size() != 1) {
diff --git a/tool/CommandSoeRead.cpp b/tool/CommandSoeRead.cpp
index 886b2cbb..de30e83e 100644
--- a/tool/CommandSoeRead.cpp
+++ b/tool/CommandSoeRead.cpp
@@ -1,6 +1,6 @@
 /*****************************************************************************
  *
- *  Copyright (C) 2006-2009  Florian Pose, Ingenieurgemeinschaft IgH
+ *  Copyright (C) 2006-2024  Florian Pose, Ingenieurgemeinschaft IgH
  *
  *  This file is part of the IgH EtherCAT Master.
  *
@@ -118,7 +118,7 @@ void CommandSoeRead::execute(const StringVector &args)
     }
 
     MasterDevice m(getSingleMasterIndex());
-    m.open(MasterDevice::Read);
+    m.open(MasterDevice::ReadWrite);
     slaves = selectedSlaves(m);
     if (slaves.size() != 1) {
         throwSingleSlaveRequired(slaves.size());