diff --git a/VERSION b/VERSION
index a9738c9..3ad6eb8 100644
--- a/VERSION
+++ b/VERSION
@@ -1,2 +1,2 @@
-2020 October 27 2020
+2020 November 07 2020
 
diff --git a/doc/CHANGES b/doc/CHANGES
index d1fb73e..de45ec9 100644
--- a/doc/CHANGES
+++ b/doc/CHANGES
@@ -13977,3 +13977,24 @@ and a number. This change propagated to the other files position.c,
 debug.c, yaprstree.c and drawtune.c. There are too many changes in
 yapstree.c and drawtune.c to list.
 
+
+November 01 2020
+
+Yaps: James Allwright fixed a bug introduced recently that caused yaps
+to shift the notes down two ledger lines when the clef is not declared
+(parseabc.c). More security checks were introduced to prevent yaps
+and midi2abc to produce lines greater than 256 characters (drawtune.c,
+drawtune.h, yapstree.c  and midi2abc.c).
+
+November 07 2020
+Yaps: a missing voidptr prevented the compilation of drawtune.c on MacOS.
+Lines 3006-3011 was replaced with
+  if (v->place->type == LEFT_TEXT) {
+      printtext(left, v->place->item.voidptr, &textfont);
+    };
+    if (v->place->type == CENTRE_TEXT) {
+      printtext(centre, v->place->item.voidptr, &textfont);
+    };
+
+
+
diff --git a/doc/readme.txt b/doc/readme.txt
index d6a3115..fc4adbd 100644
--- a/doc/readme.txt
+++ b/doc/readme.txt
@@ -1,9 +1,9 @@
 abcMIDI :   abc <-> MIDI conversion utilities
 
-midi2abc version 3.46 June 22 2020
+midi2abc version 3.47 November 01 2020
 abc2midi version 4.44 October 19 2020
 abc2abc  version 2.12 October 19 2020
-yaps     version 1.83 October 27 2020
+yaps     version 1.85 November 07 2020
 abcmatch version 1.76 October 19 2020
 midicopy version 1.37 October 10 2020
 
@@ -14,7 +14,7 @@ J.R.Allwright@westminster.ac.uk
 University of Westminster,
 London, UK
 
-October 2020
+November 2020
 
 Seymour Shlien
 Ottawa, Canada
diff --git a/drawtune.c b/drawtune.c
index 22c33af..f5943d5 100644
--- a/drawtune.c
+++ b/drawtune.c
@@ -26,6 +26,7 @@
 
 #ifdef _MSC_VER
 #define ANSILIBS 1
+#define snprintf _snprintf
 #endif
 
 #include <stdio.h>
@@ -45,8 +46,6 @@ extern struct tune thetune;
 extern int debugging;
 extern int pagenumbering;
 extern int barnums, nnbars;
-extern char outputname[256];
-extern char outputroot[256];
 extern int make_open();
 extern void printlib();
 extern int count_dots(int *base, int *base_exp, int n, int m);
@@ -3005,12 +3004,14 @@ static int printvoiceline(struct voice* v)
     if (v->place->type == NEWPAGE) {
       newpage();
     };
+    /* [JA] 2020-11-07 */
     if (v->place->type == LEFT_TEXT) {
-      printtext(left, v->place->item, &textfont);
+      printtext(left, v->place->item.voidptr, &textfont);
     };
     if (v->place->type == CENTRE_TEXT) {
-      printtext(centre, v->place->item, &textfont);
+      printtext(centre, v->place->item.voidptr, &textfont);
     };
+
     if (v->place->type == VSKIP) {
       vskip((double)v->place->item.number);
     };
@@ -3544,7 +3545,12 @@ void printtune(struct tune* t)
       boundingbox.urx = xmargin + pagewidth;
       boundingbox.ury = ymargin + pagelen;
     };
-    sprintf(outputname, "%s%d.eps", outputroot, t->no);
+#ifdef NO_SNPRINTF
+    /* [SS] 2020-11-01 */
+    sprintf(outputname,  "%s%d.eps", outputroot, t->no); /* [JA] 2020-11-01 */
+#else
+    snprintf(outputname, MAX_OUTPUTNAME, "%s%d.eps", outputroot, t->no); /* [JA] 2020-11-01 */
+#endif
     open_output_file(outputname, &boundingbox);
   } else {
     make_open();
diff --git a/drawtune.h b/drawtune.h
index 0bf2c31..871f392 100644
--- a/drawtune.h
+++ b/drawtune.h
@@ -8,6 +8,13 @@ extern int eps_out;
 struct bbox {
   int llx, lly, urx, ury;
 };
+
+/* may add .ps or <N>.eps to outputroot to get outputname [JA] 2020-11-01 */
+#define MAX_OUTPUTROOT 250
+#define MAX_OUTPUTNAME (MAX_OUTPUTROOT + 20)
+extern char outputroot[MAX_OUTPUTROOT + 1];
+extern char outputname[MAX_OUTPUTNAME + 1];
+
 #ifdef ANSILIBS
 extern void setmargins(char* s);
 extern void setpagesize(char* s);
diff --git a/midi2abc.c b/midi2abc.c
index 4d73395..9061e2c 100644
--- a/midi2abc.c
+++ b/midi2abc.c
@@ -45,7 +45,7 @@
  * based on public domain 'midifilelib' package.
  */
 
-#define VERSION "3.46 June 22 2020 midi2abc"
+#define VERSION "3.47 November 01 2020 midi2abc"
 
 /* Microsoft Visual C++ Version 6.0 or higher */
 #ifdef _MSC_VER
@@ -375,6 +375,7 @@ char* s;
   if (numbytes > 1024) numbytes = 1024; /* [SS] 2019-08-11 */
   p = (char*) checkmalloc(numbytes); /* [SS] 2019-04-13  2019-08-11*/
   strncpy(p, s,numbytes); /* [SS] 2017-08-30 [SDG] 2020-06-03 */
+  p[numbytes-1] = '\0'; /* [JA] 2020-11-01 */
   return(p);
 }
 
diff --git a/parseabc.c b/parseabc.c
index 8320cc4..4cae5d8 100644
--- a/parseabc.c
+++ b/parseabc.c
@@ -166,7 +166,11 @@ char * concatenatestring(s1,s2)
 { 
    int len = strlen(s1) + strlen(s2) + 1;
    char *p = (char *) checkmalloc(len);
+#ifdef NO_SNPRINTF
+   sprintf(p, "%s%s",s1,s2); /* [SS] 2020-11-01 */
+#else
    snprintf(p,len, "%s%s",s1,s2);
+#endif
   return p;
 }
 
@@ -598,7 +602,11 @@ int isclef (char *s, cleftype_t * new_clef,
   if (expect_clef && !gotclef) {
     char error_message[80];
     
+#ifdef NO_SNPRINTF
+    sprintf (error_message, "clef %s not recognized", s);
+#else
     snprintf (error_message, 80, "clef %s not recognized", s);
+#endif
     event_warning (error_message);
   } 
   return (gotclef);
@@ -657,10 +665,15 @@ lcase (s)
 void init_voice_contexts (void)
 {
   int i;
+  cleftype_t default_clef;  /* [JA] 2020-11-01 */
+
+  /* we use treble clef when no clef is explicitly specified */
+  get_standard_clef ("treble", &default_clef); /* default to treble clef */
   for (i = 0; i < MAX_VOICES; i++) {      /* [SS} 2015-03-15 */
     voicecode[i].label[0] = '\0';
     voicecode[i].expect_repeat = 0;
     voicecode[i].repeat_count = 0;
+    copy_clef(&voicecode[i].clef, &default_clef); /* [JA] 2020-11-01 */
   }
 }
 
@@ -730,8 +743,13 @@ int interpret_voice_label (char *s, int num)
     {
       char error_message[80];
 
+#ifdef NO_SNPRINT 
+      sprintf(error_message, "V:%d out of sequence, treating as V:%d",
+               num, num_voices); /* [SS] 2020-10-01 */
+#else
       snprintf(error_message, 80, "V:%d out of sequence, treating as V:%d",
                num, num_voices);
+#endif
       event_warning(error_message);
       num = num_voices + 1;
     }
@@ -2123,7 +2141,11 @@ parsefield (key, field)
 	int num, denom;
 
 	/* strncpy (timesigstring, place, 16);   [SS] 2011-08-19 */
+#ifdef NO_SNPRINT 
+	sprintf(timesigstring,"%s",place); /* [SEG] 2020-06-07 */
+#else
 	snprintf(timesigstring,sizeof(timesigstring),"%s",place); /* [SEG] 2020-06-07 */
+#endif
 	if (strncmp (place, "none", 4) == 0)
         /* converts 'M: none'  to 'M: 4/4' otherwise a warning 
 	 * is returned if not a fraction [SS] */
@@ -2352,12 +2374,21 @@ static void check_bar_repeats (int bar_type, char *replist)
 
         if (cv->repeat_count == 0)
         {
+#ifdef NO_SNPRINT 
+          sprintf(error_message, "Missing repeat at start ? Unexpected :|%s found", replist);
+#else
           snprintf(error_message, 80, "Missing repeat at start ? Unexpected :|%s found", replist);
+#endif
           event_warning (error_message);
         }
         else
         {
+#ifdef NO_SNPRINT 
+          sprintf(error_message,  "Unexpected :|%s found", replist);
+#else
           snprintf(error_message, 80, "Unexpected :|%s found", replist);
+#endif
+
           event_warning (error_message);
         }
       };
diff --git a/yapstree.c b/yapstree.c
index 8c76140..ca2020f 100644
--- a/yapstree.c
+++ b/yapstree.c
@@ -22,7 +22,7 @@
 /* yapstree.c - back-end for abc parser. */
 /* generates a data structure suitable for typeset music */
 
-#define VERSION "1.83 October 27 2020 yaps"
+#define VERSION "1.85 November 07 2020 yaps"
 #include <stdio.h>
 #ifdef USE_INDEX
 #define strchr index
@@ -62,8 +62,8 @@ extern int oldchordconvention; /* for handling +..+ chords */
 struct voice* cv;
 struct tune thetune;
 
-char outputname[256];
-char outputroot[256];
+char outputname[MAX_OUTPUTNAME + 1]; /* [JA] 2020-11-01 */
+char outputroot[MAX_OUTPUTROOT + 1];
 char matchstring[256];
 int fileopen;
 
@@ -1213,14 +1213,29 @@ char** filename;
   };
   fileopen = 0;
   filearg = getarg("-o", argc, argv);
+  /* beware of security risk from buffer overflows here [JA] 2020-11-01*/
   if (filearg != -1) { 
-    /*strcpy(outputname, argv[filearg]); security risk buffer overflow */
-    /* strncpy(outputname, argv[filearg],sizeof(outputname)-1);  [SDG] 2020-06-03 */
-    snprintf(outputname, sizeof(outputname)-1,"%s",argv[filearg]); /* [SDG] 2020-06-03 */
+    if (strlen(argv[filearg]) > MAX_OUTPUTROOT)  /* [JA] 2020-11-01 */
+    {
+      printf("Specified output filename exceeds limit.\n");
+      exit(1);
+    }
+#ifdef NO_SNPRINTF
+    sprintf(outputname, "%s",argv[filearg]); /* [SS] 2020-11-01 */
+#else
+    snprintf(outputname, MAX_OUTPUTROOT,"%s",argv[filearg]);
+#endif
   } else {
-    /* strcpy(outputname, argv[1]); security risk: buffer overflow */
-    /* strncpy(outputname, argv[1],sizeof(outputname)-4);  [SDG] 2020-06-03 */
-    snprintf(outputname,sizeof(outputname)-4,"%s", argv[1]); /* [SDG] 2020-06-03 */
+    if (strlen(argv[1]) > MAX_OUTPUTROOT)
+    {
+      printf("Implied output filename exceeds limit.\n");
+      exit(1);
+    }
+#ifdef NO_SNPRINTF
+    sprintf(outputname,"%s", argv[1]);  /* [SS] 2020-11-01 */
+#else
+    snprintf(outputname,MAX_OUTPUTROOT,"%s", argv[1]);
+#endif
     place = strchr(outputname, '.');
     if (place == NULL) {
       strcat(outputname, ".ps");