Index: /trunk/FACT++/gui/MainWindow.cc
===================================================================
--- /trunk/FACT++/gui/MainWindow.cc	(revision 11761)
+++ /trunk/FACT++/gui/MainWindow.cc	(revision 11762)
@@ -522,10 +522,12 @@
 void MainWindow::on_fLpIntIntensity_valueChanged(int val)
 {
-    Dim::SendCommand("FTM_CONTROL/SET_INTENSITY_LPINT", uint16_t(val));
+    if (!fInHandler)
+        Dim::SendCommand("FTM_CONTROL/SET_INTENSITY_LPINT", uint16_t(val));
 }
 
 void MainWindow::on_fLpExtIntensity_valueChanged(int val)
 {
-    Dim::SendCommand("FTM_CONTROL/SET_INTENSITY_LPEXT", uint16_t(val));
+    if (!fInHandler)
+        Dim::SendCommand("FTM_CONTROL/SET_INTENSITY_LPEXT", uint16_t(val));
 }