diff -up wrk/pccts/antlr/fset2.c.wrk wrk/pccts/antlr/fset2.c
--- wrk/pccts/antlr/fset2.c.wrk	2013-12-05 11:33:33.561962126 +0100
+++ wrk/pccts/antlr/fset2.c	2013-12-05 11:33:52.009105807 +0100
@@ -2210,7 +2210,7 @@ void MR_backTraceReport()
       if (p->ntype != nToken) continue;
       tn=(TokNode *)p;
       if (depth != 0) fprintf(stdout," ");
-      fprintf(stdout,TerminalString(tn->token));
+      fprintf(stdout,"%s",TerminalString(tn->token));
       depth++;
       if (! MR_AmbAidMultiple) {
         if (set_nil(tn->tset)) {
diff -up wrk/pccts/antlr/gen.c.wrk wrk/pccts/antlr/gen.c
--- wrk/pccts/antlr/gen.c.wrk	2013-12-05 11:26:36.384714088 +0100
+++ wrk/pccts/antlr/gen.c	2013-12-05 11:29:41.894158536 +0100
@@ -3866,7 +3866,7 @@ int file;
 /* MR10 */    _gen(" *  ");
 /* MR10 */    for (i=0 ; i < Save_argc ; i++) {
 /* MR10 */      _gen(" ");
-/* MR10 */      _gen(Save_argv[i]);
+/* MR10 */      _gen1("%s",Save_argv[i]);
 /* MR10 */    };
 	_gen("\n");
 	_gen(" *\n");
diff -up wrk/pccts/antlr/lex.c.wrk wrk/pccts/antlr/lex.c
--- wrk/pccts/antlr/lex.c.wrk	2013-12-05 11:15:51.912722340 +0100
+++ wrk/pccts/antlr/lex.c	2013-12-05 11:19:04.039210441 +0100
@@ -706,7 +706,7 @@ FILE *output;
 /* MR26 */			if (! (isalpha(*t) || isdigit(*t) || *t == '_' || *t == '$')) break;
 /* MR26 */		}
 /* MR26 */	}
-/* MR26 */	fprintf(output,strBetween(pSymbol, t, pSeparator));
+/* MR26 */	fprintf(output,"%s",strBetween(pSymbol, t, pSeparator));
 
     *q = p;
     return (*pSeparator  == 0);
@@ -771,7 +771,7 @@ FILE *f;
 				  &pValue,
 				  &pSeparator,
 				  &nest);
-	fprintf(f,strBetween(pDataType, pSymbol, pSeparator));
+	fprintf(f,"%s",strBetween(pDataType, pSymbol, pSeparator));
 }
 
 /* check to see if string e is a word in string s */
@@ -852,9 +852,9 @@ int i;
 					  &pSeparator,
 					  &nest);
 		fprintf(f,"\t");
-		fprintf(f,strBetween(pDataType, pSymbol, pSeparator));
+		fprintf(f,"%s",strBetween(pDataType, pSymbol, pSeparator));
 		fprintf(f," ");
-		fprintf(f,strBetween(pSymbol, pEqualSign, pSeparator));
+		fprintf(f,"%s",strBetween(pSymbol, pEqualSign, pSeparator));
 		fprintf(f,";\n");
     }
 	fprintf(f,"};\n");