--- linuxsampler/trunk/src/engines/EngineChannelBase.h	2012/03/17 06:19:01	2335
+++ linuxsampler/trunk/src/engines/EngineChannelBase.h	2012/06/24 16:11:31	2352
@@ -222,7 +222,10 @@
                 this->ProcessActiveVoices(&handler);
 
                 // empty exclusive group specific event lists
-                ClearGroupEventLists();
+                // (pInstrument == 0 could mean that LoadInstrument is
+                // building new group event lists, so we must check
+                // for that)
+                if (pInstrument) ClearGroupEventLists();
             }
 
             // implementation of abstract methods derived from interface class 'InstrumentConsumer'