Index: trunk/FACT++/src/biasctrl.cc
===================================================================
--- trunk/FACT++/src/biasctrl.cc	(revision 13116)
+++ trunk/FACT++/src/biasctrl.cc	(revision 13134)
@@ -662,4 +662,11 @@
 
         fSendCounter += kNumChannels;
+
+        if (fWaitingForAnswer>=0)
+        {
+            ostringstream msg;
+            msg << "SetAllChannels while waiting for answer to last command (id=" << fWaitingForAnswer << ")";
+            Warn(msg);
+        }
 
         PostMessage(data);