diff --git a/alliance/src/mbk/src/mut.h b/alliance/src/mbk/src/mut.h
index 11c29146..81392987 100644
--- a/alliance/src/mbk/src/mut.h
+++ b/alliance/src/mbk/src/mut.h
@@ -63,8 +63,8 @@ extern "C" {
 #define WRITE_TEXT  "w" /* write access */
 
 /* chain buffer size */
-#define BUFSIZE     1024
-#define SIGSIZE     1024
+#define BUFSIZE     8192
+#define SIGSIZE     8192
 
 /* USER field codes  */
 #define LOFIGCHAIN  4592
diff --git a/alliance/src/mbk/src/mvl_scomp_y.y b/alliance/src/mbk/src/mvl_scomp_y.y
index 34ccccb4..60f44410 100644
--- a/alliance/src/mbk/src/mvl_scomp_y.y
+++ b/alliance/src/mbk/src/mvl_scomp_y.y
@@ -19,6 +19,7 @@
 #include "mvl_syacc.h"
 #include "mvl_stdef.h"
 #include "gen_generic.h"
+//#define  YYDEBUG  1
 
 
 extern int           yydebug    = 1;
diff --git a/alliance/src/mbk/src/mvl_sspec.c b/alliance/src/mbk/src/mvl_sspec.c
index 3132ab53..0edae76b 100644
--- a/alliance/src/mbk/src/mvl_sspec.c
+++ b/alliance/src/mbk/src/mvl_sspec.c
@@ -86,7 +86,7 @@ short           left ;		/* array left bound (= -1 if scalar)	*/
 short           right;		/* array right bound (= -1 if scalar)	*/
 
   {
-  char          extname[100];
+  char          extname[65536];
   short         i           ;
   short         inc         = 1;
   struct locon *ptcon       = NULL;