diff --git a/ATxService/RoboCommand.cs b/ATxService/RoboCommand.cs
index 2bbb6a96fb0c1dd61e916d285bf8fb883fe00a22..48c5e9d57af9d9de0106efca33440902271039af 100644
--- a/ATxService/RoboCommand.cs
+++ b/ATxService/RoboCommand.cs
@@ -151,6 +151,7 @@ namespace ATxService
         /// RoboSharp OnCommandCompleted callback handler.
         /// </summary>
         private void RsCommandCompleted(object sender, RoboCommandCompletedEventArgs e) {
+            Log.Trace("RsCommandCompleted()");
             if (_transferState == TxState.DoNothing)
                 return;