diff --git a/qt-openzwave/source/qtozwassociationmodel_p.cpp b/qt-openzwave/source/qtozwassociationmodel_p.cpp
index a9578ec..f008e51 100644
--- a/qt-openzwave/source/qtozwassociationmodel_p.cpp
+++ b/qt-openzwave/source/qtozwassociationmodel_p.cpp
@@ -114,7 +114,7 @@ void QTOZW_Associations_internal::addAssociation(quint8 _nodeID, quint8 _groupID
         return;
     }
     QString target;
-    target.append(QString::number(_targetNode)).append(":").append(QString::number(_targetInstance));
+    target.append(QString::number(_targetNode)).append(".").append(QString::number(_targetInstance));
     QStringList targetlist = this->m_associationData[row][associationColumns::Members].toStringList();
     if (targetlist.contains(target)) {
         qCWarning(associationModel) << "addAssociation: Target " << target << "already exists in Group " << _groupIDX << "for node " << _nodeID;
@@ -134,7 +134,7 @@ void QTOZW_Associations_internal::delAssociation(quint8 _nodeID, quint8 _groupID
         return;
     }
     QString target;
-    target.append(QString::number(_targetNode)).append(":").append(QString::number(_targetInstance));
+    target.append(QString::number(_targetNode)).append(".").append(QString::number(_targetInstance));
     QStringList targetlist = this->m_associationData[row][associationColumns::Members].toStringList();
     if (!targetlist.contains(target)) {
         qCWarning(associationModel) << "delAssociation: Target " << target << "does not exist in Group " << _groupIDX << "for node " << _nodeID;
@@ -154,7 +154,7 @@ bool QTOZW_Associations_internal::findAssociation(quint8 _nodeID, quint8 _groupI
         return false;
     }
     QString target;
-    target.append(QString::number(_targetNode)).append(":").append(QString::number(_targetInstance));
+    target.append(QString::number(_targetNode)).append(".").append(QString::number(_targetInstance));
     QStringList targetlist = this->m_associationData[row][associationColumns::Members].toStringList();
     if (!targetlist.contains(target)) {
         return false;
diff --git a/qt-openzwave/source/qtozwmanager_p.cpp b/qt-openzwave/source/qtozwmanager_p.cpp
index c38e856..8f093e2 100644
--- a/qt-openzwave/source/qtozwmanager_p.cpp
+++ b/qt-openzwave/source/qtozwmanager_p.cpp
@@ -1152,8 +1152,8 @@ void QTOZWManager_Internal::pvt_nodeGroupChanged(quint8 node, quint8 group)
     QStringList removeitems;
     for (int i = 0; i < list.size(); ++i) {
         QString member = list.at(i);
-        int targetnode = member.split(":")[0].toInt();
-        int targetinstance = member.split(":")[1].toInt();
+        int targetnode = member.split(".")[0].toInt();
+        int targetinstance = member.split(".")[1].toInt();
         bool found = false;
         for (quint32 j = 0; j < count; j++) {
             if (targetnode == ia[i].m_nodeId && targetinstance == ia[i].m_instance)