diff --git a/cmMidiFile.c b/cmMidiFile.c
index a7aaf36..fb26f63 100644
--- a/cmMidiFile.c
+++ b/cmMidiFile.c
@@ -1368,13 +1368,10 @@ cmMfRC_t cmMidiFileInsertMsg( cmMidiFileH_t h, unsigned uid, int dtick, cmMidiBy
 
 }
 
-cmMfRC_t  cmMidiFileInsertTrackMsg( cmMidiFileH_t h, unsigned trkIdx, const cmMidiTrackMsg_t* msg, unsigned* uidRef )
+cmMfRC_t  cmMidiFileInsertTrackMsg( cmMidiFileH_t h, unsigned trkIdx, const cmMidiTrackMsg_t* msg )
 {
   _cmMidiFile_t* p = _cmMidiFileHandleToPtr(h);
 
-  if( uidRef != NULL )
-    *uidRef = cmInvalidId;
-
   // validate the track index
   if( trkIdx >= p->trkN )
     return cmErrMsg(&p->err,kInvalidTrkIndexMfRC,"The track index (%i) is invalid.",trkIdx);
@@ -1398,9 +1395,6 @@ cmMfRC_t  cmMidiFileInsertTrackMsg( cmMidiFileH_t h, unsigned trkIdx, const cmMi
     memcpy((void*)m->u.voidPtr,msg->u.voidPtr,msg->byteCnt);
   }
 
-  if( uidRef != NULL )
-    *uidRef = m->uid;
-  
   cmMidiTrackMsg_t* m0 = NULL;                  // msg before insertion
   cmMidiTrackMsg_t* m1 = p->trkV[trkIdx].base;  // msg after insertion
 
@@ -1461,7 +1455,7 @@ cmMfRC_t  cmMidiFileInsertTrackMsg( cmMidiFileH_t h, unsigned trkIdx, const cmMi
    
 }
 
-cmMfRC_t  cmMidiFileInsertTrackChMsg( cmMidiFileH_t h, unsigned trkIdx, unsigned atick, cmMidiByte_t status, cmMidiByte_t d0, cmMidiByte_t d1, unsigned* uidRef )
+cmMfRC_t  cmMidiFileInsertTrackChMsg( cmMidiFileH_t h, unsigned trkIdx, unsigned atick, cmMidiByte_t status, cmMidiByte_t d0, cmMidiByte_t d1 )
 {
   cmMidiTrackMsg_t m;
   cmMidiChMsg_t   cm;
@@ -1480,10 +1474,10 @@ cmMfRC_t  cmMidiFileInsertTrackChMsg( cmMidiFileH_t h, unsigned trkIdx, unsigned
 
   assert( m.status >= kNoteOffMdId && m.status <= kPbendMdId );
   
-  return cmMidiFileInsertTrackMsg(h,trkIdx,&m,uidRef);
+  return cmMidiFileInsertTrackMsg(h,trkIdx,&m);
 }
 
-cmMfRC_t  cmMidFileInsertTrackTempoMsg( cmMidiFileH_t h, unsigned trkIdx, unsigned atick, unsigned bpm, unsigned* uidRef )
+cmMfRC_t  cmMidFileInsertTrackTempoMsg( cmMidiFileH_t h, unsigned trkIdx, unsigned atick, unsigned bpm )
 {
   cmMidiTrackMsg_t m;
 
@@ -1494,7 +1488,7 @@ cmMfRC_t  cmMidFileInsertTrackTempoMsg( cmMidiFileH_t h, unsigned trkIdx, unsign
   m.metaId     = kTempoMdId;
   m.u.iVal     = 60000000/bpm;  // convert BPM to microsPerQN
   
-  return cmMidiFileInsertTrackMsg(h,trkIdx,&m,uidRef);
+  return cmMidiFileInsertTrackMsg(h,trkIdx,&m);
 }
 
 
diff --git a/cmMidiFile.h b/cmMidiFile.h
index efc5976..55b8ef7 100644
--- a/cmMidiFile.h
+++ b/cmMidiFile.h
@@ -185,9 +185,9 @@ extern "C" {
   //   byteCnt  - used to allocate storage for the data element in 'cmMidiTrackMsg_t.u'
   //   u        - the message data
   //
-  cmMfRC_t             cmMidiFileInsertTrackMsg(     cmMidiFileH_t h, unsigned trkIdx, const cmMidiTrackMsg_t* msg, unsigned* uidRef );
-  cmMfRC_t             cmMidiFileInsertTrackChMsg(   cmMidiFileH_t h, unsigned trkIdx, unsigned atick, cmMidiByte_t status, cmMidiByte_t d0, cmMidiByte_t d1, unsigned* uidRef );
-  cmMfRC_t             cmMidFileInsertTrackTempoMsg( cmMidiFileH_t h, unsigned trkIdx, unsigned atick, unsigned bpm, unsigned* uidRef );
+  cmMfRC_t             cmMidiFileInsertTrackMsg(     cmMidiFileH_t h, unsigned trkIdx, const cmMidiTrackMsg_t* msg );
+  cmMfRC_t             cmMidiFileInsertTrackChMsg(   cmMidiFileH_t h, unsigned trkIdx, unsigned atick, cmMidiByte_t status, cmMidiByte_t d0, cmMidiByte_t d1 );
+  cmMfRC_t             cmMidFileInsertTrackTempoMsg( cmMidiFileH_t h, unsigned trkIdx, unsigned atick, unsigned bpm );
   
   // Return a pointer to the first msg at or after 'usecsOffs' or kInvalidIdx if no
   // msg exists after 'usecsOffs'.  Note that 'usecOffs' is an offset from the beginning