diff --git a/ase/awk/awk.c b/ase/awk/awk.c
index 231b84bb..64861b3c 100644
--- a/ase/awk/awk.c
+++ b/ase/awk/awk.c
@@ -1,5 +1,5 @@
 /* 
- * $Id: awk.c,v 1.112 2007-03-02 10:12:40 bacon Exp $ 
+ * $Id: awk.c,v 1.113 2007-03-04 06:26:45 bacon Exp $ 
  *
  * {License}
  */
@@ -215,6 +215,8 @@ int ase_awk_clear (ase_awk_t* awk)
 	awk->tree.ok = 0;
 	awk->tree.nbglobals = 0;
 	awk->tree.nglobals = 0;	
+	awk->tree.cur_afn.ptr = ASE_NULL;
+	awk->tree.cur_afn.len = 0;
 	ase_awk_map_clear (&awk->tree.afns);
 
 	if (awk->tree.begin != ASE_NULL) 
diff --git a/ase/awk/awk.h b/ase/awk/awk.h
index aed86810..9d171f14 100644
--- a/ase/awk/awk.h
+++ b/ase/awk/awk.h
@@ -1,5 +1,5 @@
 /* 
- * $Id: awk.h,v 1.198 2007-03-03 14:44:31 bacon Exp $
+ * $Id: awk.h,v 1.199 2007-03-04 06:26:45 bacon Exp $
  *
  * {License}
  */
@@ -261,6 +261,7 @@ enum
 	ASE_AWK_EWHILE,         /* keyword 'while' is expected */
 	ASE_AWK_EASSIGN,        /* assignment statement expected */
 	ASE_AWK_EIDENT,         /* identifier expected */
+	ASE_AWK_EFNNAME,        /* invalid function name */
 	ASE_AWK_EBLKBEG,        /* BEGIN requires an action block */
 	ASE_AWK_EBLKEND,        /* END requires an action block */
 	ASE_AWK_EDUPBEG,        /* duplicate BEGIN */
diff --git a/ase/awk/awk_i.h b/ase/awk/awk_i.h
index f8bafd29..8da278a3 100644
--- a/ase/awk/awk_i.h
+++ b/ase/awk/awk_i.h
@@ -1,5 +1,5 @@
 /*
- * $Id: awk_i.h,v 1.108 2007-03-03 14:44:31 bacon Exp $
+ * $Id: awk_i.h,v 1.109 2007-03-04 06:26:45 bacon Exp $
  *
  * {License}
  */
@@ -65,6 +65,7 @@ struct ase_awk_tree_t
 {
 	ase_size_t nglobals; /* total number of globals */
 	ase_size_t nbglobals; /* number of builtin globals */
+	ase_cstr_t cur_afn;
 	ase_awk_map_t afns; /* awk function map */
 	ase_awk_nde_t* begin;
 	ase_awk_nde_t* end;
@@ -192,6 +193,11 @@ struct ase_awk_t
 		} depth;
 	} rex;
 
+	struct
+	{
+		ase_char_t* fmt[1024];
+	} tmp;
+
 	/* housekeeping */
 	int errnum;
 	ase_size_t errlin;
diff --git a/ase/awk/err.c b/ase/awk/err.c
index 0f5a8960..97ce3c47 100644
--- a/ase/awk/err.c
+++ b/ase/awk/err.c
@@ -1,5 +1,5 @@
 /*
- * $Id: err.c,v 1.79 2007-03-03 14:44:31 bacon Exp $
+ * $Id: err.c,v 1.80 2007-03-04 06:26:45 bacon Exp $
  *
  * {License}
  */
@@ -74,17 +74,18 @@ static const ase_char_t* __geterrstr (int errnum)
 		ASE_T("keyword 'while' expected"),
 		ASE_T("assignment statement expected"),
 		ASE_T("identifier expected"),
+		ASE_T("'%.*s' not a valid function name"),
 		ASE_T("BEGIN requires an action block"),
 		ASE_T("END requires an action block"),
 		ASE_T("duplicate BEGIN"),
 		ASE_T("duplicate END"),
-		ASE_T("built-in function redefined"),
-		ASE_T("function redefined"),
-		ASE_T("global variable redefined"),
-		ASE_T("parameter redefined"),
-		ASE_T("duplicate parameter name"),
-		ASE_T("duplicate global variable name"),
-		ASE_T("duplicate local variable name"),
+		ASE_T("built-in function '%.*s' redefined"),
+		ASE_T("function '%.*s' redefined"),
+		ASE_T("global variable '%.*s' redefined"),
+		ASE_T("parameter '%.*s' redefined"),
+		ASE_T("duplicate parameter name '%.*s'"),
+		ASE_T("duplicate global variable '%.*s'"),
+		ASE_T("duplicate local variable '%.*s'"),
 		ASE_T("undefined identifier"),
 		ASE_T("l-value required"),
 		ASE_T("too many global variables"),
diff --git a/ase/awk/parse.c b/ase/awk/parse.c
index 00de097a..02a020c1 100644
--- a/ase/awk/parse.c
+++ b/ase/awk/parse.c
@@ -1,5 +1,5 @@
 /*
- * $Id: parse.c,v 1.248 2007-03-03 13:22:00 bacon Exp $
+ * $Id: parse.c,v 1.249 2007-03-04 06:26:45 bacon Exp $
  *
  * {License}
  */
@@ -126,6 +126,9 @@ struct __binmap_t
 	int binop;
 };
 
+#define PTR_EOF ASE_T("<EOF>")
+#define LEN_EOF 5
+
 static int __parse (ase_awk_t* awk);
 
 static ase_awk_t* __parse_progunit (ase_awk_t* awk);
@@ -710,25 +713,21 @@ static ase_awk_nde_t* __parse_function (ase_awk_t* awk)
 	if (!MATCH(awk,TOKEN_IDENT)) 
 	{
 		/* cannot find a valid identifier for a function name */
+		ase_cstr_t errarg;
+
 		if (MATCH(awk,TOKEN_EOF))
 		{
-			ase_awk_seterror_old (
-				awk, ASE_AWK_EIDENT, awk->token.prev.line,
-				ASE_T("function definition without a name"));
+			errarg.ptr = PTR_EOF;
+			errarg.len = LEN_EOF;
 		}
 		else
 		{
-			awk->prmfns.misc.sprintf (
-				awk->prmfns.misc.custom_data,
-				awk->errmsg, ASE_COUNTOF(awk->errmsg),
-				ASE_T("'%.*s' not a valid function name"), 
-				ASE_STR_LEN(&awk->token.name),
-				ASE_STR_BUF(&awk->token.name));
-		
-			ase_awk_seterror_old (
-				awk, ASE_AWK_EIDENT, awk->token.line,
-				awk->errmsg);
+			errarg.ptr = ASE_STR_BUF(&awk->token.name);	
+			errarg.len = ASE_STR_LEN(&awk->token.name);	
 		}
+
+		ase_awk_seterror (
+			awk, ASE_AWK_EFNNAME, awk->token.line, &errarg, 1);
 		return ASE_NULL;
 	}
 
@@ -738,15 +737,13 @@ static ase_awk_nde_t* __parse_function (ase_awk_t* awk)
 	/* check if it is a builtin function */
 	if (ase_awk_getbfn (awk, name, name_len) != ASE_NULL)
 	{
-		awk->prmfns.misc.sprintf (
-			awk->prmfns.misc.custom_data,
-			awk->errmsg, ASE_COUNTOF(awk->errmsg),
-			ASE_T("built-in function '%.*s' redefined"), 
-			name_len, name);
+		ase_cstr_t errarg;
+
+		errarg.ptr = name;
+		errarg.len = name_len;
 	
-		ase_awk_seterror_old (
-			awk, ASE_AWK_EBFNRED, awk->token.line,
-			awk->errmsg);
+		ase_awk_seterror (
+			awk, ASE_AWK_EBFNRED, awk->token.line, &errarg, 1);
 
 		return ASE_NULL;
 	}
@@ -754,15 +751,13 @@ static ase_awk_nde_t* __parse_function (ase_awk_t* awk)
 	if (ase_awk_map_get(&awk->tree.afns, name, name_len) != ASE_NULL) 
 	{
 		/* the function is defined previously */
-		awk->prmfns.misc.sprintf (
-			awk->prmfns.misc.custom_data,
-			awk->errmsg, ASE_COUNTOF(awk->errmsg),
-			ASE_T("function '%.*s' redefined"), 
-			name_len, name);
+		ase_cstr_t errarg;
+
+		errarg.ptr = name;
+		errarg.len = name_len;
 	
-		ase_awk_seterror_old (
-			awk, ASE_AWK_EAFNRED, awk->token.line,
-			awk->errmsg);
+		ase_awk_seterror (
+			awk, ASE_AWK_EAFNRED, awk->token.line, &errarg, 1);
 
 		return ASE_NULL;
 	}
@@ -775,15 +770,14 @@ static ase_awk_nde_t* __parse_function (ase_awk_t* awk)
 		g = ase_awk_tab_find (&awk->parse.globals, 0, name, name_len);
 		if (g != (ase_size_t)-1) 
 		{
-			awk->prmfns.misc.sprintf (
-				awk->prmfns.misc.custom_data,
-				awk->errmsg, ASE_COUNTOF(awk->errmsg),
-				ASE_T("global variable '%.*s' redefined"), 
-				name_len, name);
+			ase_cstr_t errarg;
+
+			errarg.ptr = name;
+			errarg.len = name_len;
 	
-			ase_awk_seterror_old (
-				awk, ASE_AWK_EGBLRED, awk->token.line,
-				awk->errmsg);
+			ase_awk_seterror (
+				awk, ASE_AWK_EGBLRED, awk->token.line, 
+				&errarg, 1);
 
 			return ASE_NULL;
 		}
@@ -793,8 +787,8 @@ static ase_awk_nde_t* __parse_function (ase_awk_t* awk)
 	name_dup = ase_strxdup (name, name_len, &awk->prmfns.mmgr);
 	if (name_dup == ASE_NULL) 
 	{
-		ase_awk_seterror_old (
-			awk, ASE_AWK_ENOMEM, awk->token.line, ASE_NULL);
+		ase_awk_seterror (
+			awk, ASE_AWK_ENOMEM, awk->token.line, ASE_NULL, 0);
 		return ASE_NULL;
 	}
 
@@ -887,18 +881,17 @@ static ase_awk_nde_t* __parse_function (ase_awk_t* awk)
 				if (ase_strxncmp (name_dup, name_len, param, param_len) == 0 ||
 				    ase_awk_map_get (&awk->tree.afns, param, param_len) != ASE_NULL) 
 				{
+					ase_cstr_t errarg;
+					
 					ASE_AWK_FREE (awk, name_dup);
 					ase_awk_tab_clear (&awk->parse.params);
 					
-					awk->prmfns.misc.sprintf (
-						awk->prmfns.misc.custom_data,
-						awk->errmsg, ASE_COUNTOF(awk->errmsg),
-						ASE_T("conflicting parameter '%.*s' with the function"), 
-						param_len, param);
+					errarg.ptr = param;
+					errarg.len = param_len;
 
-					ase_awk_seterror_old (
-						awk, ASE_AWK_EDUPPAR, awk->token.line,
-						awk->errmsg);
+					ase_awk_seterror (
+						awk, ASE_AWK_EAFNRED, awk->token.line,
+						&errarg, 1);
 
 					return ASE_NULL;
 				}
@@ -915,18 +908,17 @@ static ase_awk_nde_t* __parse_function (ase_awk_t* awk)
 				&awk->parse.params, 
 				0, param, param_len) != (ase_size_t)-1) 
 			{
+				ase_cstr_t errarg;
+
 				ASE_AWK_FREE (awk, name_dup);
 				ase_awk_tab_clear (&awk->parse.params);
 
-				awk->prmfns.misc.sprintf (
-					awk->prmfns.misc.custom_data,
-					awk->errmsg, ASE_COUNTOF(awk->errmsg),
-					ASE_T("duplicate parameter '%.*s'"),
-					param_len, param);
+				errarg.ptr = param;
+				errarg.len = param_len;
 
-				ase_awk_seterror_old (
+				ase_awk_seterror (
 					awk, ASE_AWK_EDUPPAR, awk->token.line,
-					awk->errmsg);
+					&errarg, 1);
 
 				return ASE_NULL;
 			}
@@ -1028,8 +1020,18 @@ static ase_awk_nde_t* __parse_function (ase_awk_t* awk)
 		return ASE_NULL; 
 	}
 
+	/* remember the current function name so that the body parser
+	 * can know the name of the current function being parsed */
+	awk->tree.cur_afn.ptr = name_dup;
+	awk->tree.cur_afn.len = name_len;
+
 	/* actual function body */
 	body = awk->parse.parse_block (awk, awk->token.prev.line, ase_true);
+
+	/* clear the current function name remembered */
+	awk->tree.cur_afn.ptr = ASE_NULL;
+	awk->tree.cur_afn.len = 0;
+
 	if (body == ASE_NULL) 
 	{
 		ASE_AWK_FREE (awk, name_dup);
@@ -1067,8 +1069,8 @@ static ase_awk_nde_t* __parse_function (ase_awk_t* awk)
 		ase_awk_clrpt (awk, body);
 		ASE_AWK_FREE (awk, afn);
 
-		ase_awk_seterror_old (
-			awk, ASE_AWK_ENOMEM, awk->token.line, ASE_NULL);
+		ase_awk_seterror (
+			awk, ASE_AWK_ENOMEM, awk->token.line, ASE_NULL, 0);
 		return ASE_NULL;
 	}
 
@@ -1351,13 +1353,15 @@ static ase_awk_t* __add_global (
 			/* check if it conflict with a builtin function name */
 			if (ase_awk_getbfn (awk, name, len) != ASE_NULL)
 			{
-				awk->prmfns.misc.sprintf (
-					awk->prmfns.misc.custom_data,
-					awk->errmsg, ASE_COUNTOF(awk->errmsg),
-					ASE_T("built-in function '%.*s' redefined"),
-					len, name);
+				ase_cstr_t errarg;
+
+				errarg.ptr = name;
+				errarg.len = len;
+	
+				ase_awk_seterror (
+					awk, ASE_AWK_EBFNRED, awk->token.line,
+					&errarg, 1);
 
-				ase_awk_seterror_old (awk, ASE_AWK_EBFNRED, line, awk->errmsg);
 				return ASE_NULL;
 			}
 
@@ -1365,13 +1369,14 @@ static ase_awk_t* __add_global (
 			if (ase_awk_map_get (
 				&awk->tree.afns, name, len) != ASE_NULL) 
 			{
-				awk->prmfns.misc.sprintf (
-					awk->prmfns.misc.custom_data,
-					awk->errmsg, ASE_COUNTOF(awk->errmsg),
-					ASE_T("function '%.*s' redefined"),
-					len, name);
+				ase_cstr_t errarg;
+
+				errarg.ptr = name;
+				errarg.len = len;
+	
+				ase_awk_seterror (
+					awk, ASE_AWK_EAFNRED, line, &errarg, 1);
 
-				ase_awk_seterror_old (awk, ASE_AWK_EAFNRED, line, awk->errmsg);
 				return ASE_NULL;
 			}
 		}
@@ -1380,13 +1385,14 @@ static ase_awk_t* __add_global (
 		if (ase_awk_tab_find (
 			&awk->parse.globals, 0, name, len) != (ase_size_t)-1) 
 		{ 
-			awk->prmfns.misc.sprintf (
-				awk->prmfns.misc.custom_data,
-				awk->errmsg, ASE_COUNTOF(awk->errmsg),
-				ASE_T("duplicate global variable '%.*s'"),
-				len, name);
+			ase_cstr_t errarg;
+
+			errarg.ptr = name;
+			errarg.len = len;
+
+			ase_awk_seterror (
+				awk, ASE_AWK_EDUPGBL, line, &errarg, 1);
 
-			ase_awk_seterror_old (awk, ASE_AWK_EDUPGBL, line, awk->errmsg);
 			return ASE_NULL;
 		}
 	}
@@ -1504,31 +1510,34 @@ static ase_awk_t* __collect_locals (ase_awk_t* awk, ase_size_t nlocals)
 			/* check if it conflict with a builtin function name */
 			if (ase_awk_getbfn (awk, local, local_len) != ASE_NULL)
 			{
-				awk->prmfns.misc.sprintf (
-					awk->prmfns.misc.custom_data,
-					awk->errmsg, ASE_COUNTOF(awk->errmsg),
-					ASE_T("built-in function '%.*s' redefined"),
-					local_len, local);
+				ase_cstr_t errarg;
+
+				errarg.ptr = local;
+				errarg.len = local_len;
+	
+				ase_awk_seterror (
+					awk, ASE_AWK_EBFNRED, awk->token.line,
+					&errarg, 1);
 
-				ase_awk_seterror_old (
-					awk, ASE_AWK_EBFNRED, awk->token.line, 
-					awk->errmsg);
 				return ASE_NULL;
 			}
 
 			/* check if it conflict with a function name */
-			if (ase_awk_map_get (
-				&awk->tree.afns, local, local_len) != ASE_NULL) 
+			if (ase_strxncmp (
+			    	awk->tree.cur_afn.ptr, awk->tree.cur_afn.len, 
+			    	local, local_len) == 0 ||
+			    ase_awk_map_get (
+			    	&awk->tree.afns, local, local_len) != ASE_NULL) 
 			{
-				awk->prmfns.misc.sprintf (
-					awk->prmfns.misc.custom_data,
-					awk->errmsg, ASE_COUNTOF(awk->errmsg),
-					ASE_T("function '%.*s' redefined"),
-					local_len, local);
+				ase_cstr_t errarg;
 
-				ase_awk_seterror_old (
+				errarg.ptr = local;
+				errarg.len = local_len;
+	
+				ase_awk_seterror (
 					awk, ASE_AWK_EAFNRED, awk->token.line,
-					awk->errmsg);
+					&errarg, 1);
+
 				return ASE_NULL;
 			}
 		}
@@ -1537,15 +1546,15 @@ static ase_awk_t* __collect_locals (ase_awk_t* awk, ase_size_t nlocals)
 		if (ase_awk_tab_find (&awk->parse.params,
 			0, local, local_len) != (ase_size_t)-1) 
 		{
-			awk->prmfns.misc.sprintf (
-				awk->prmfns.misc.custom_data,
-				awk->errmsg, ASE_COUNTOF(awk->errmsg),
-				ASE_T("parameter '%.*s' redefined"),
-				local_len, local);
+			ase_cstr_t errarg;
 
-			ase_awk_seterror_old (
+			errarg.ptr = local;
+			errarg.len = local_len;
+	
+			ase_awk_seterror (
 				awk, ASE_AWK_EPARRED, awk->token.line,
-				awk->errmsg);
+				&errarg, 1);
+
 			return ASE_NULL;
 		}
 
@@ -1554,14 +1563,15 @@ static ase_awk_t* __collect_locals (ase_awk_t* awk, ase_size_t nlocals)
 			((awk->option & ASE_AWK_SHADING)? nlocals: 0),
 			local, local_len) != (ase_size_t)-1)
 		{
-			awk->prmfns.misc.sprintf (
-				awk->prmfns.misc.custom_data,
-				awk->errmsg, ASE_COUNTOF(awk->errmsg),
-				ASE_T("duplicate local variable '%.*s'"),
-				local_len, local);
+			ase_cstr_t errarg;
+
+			errarg.ptr = local;
+			errarg.len = local_len;
+
+			ase_awk_seterror (
+				awk, ASE_AWK_EDUPLCL, awk->token.line, 
+				&errarg, 1);
 
-			ase_awk_seterror_old (
-				awk, ASE_AWK_EDUPLCL, awk->token.line, awk->errmsg);
 			return ASE_NULL;
 		}
 
diff --git a/ase/awk/run.c b/ase/awk/run.c
index 99ad0061..69d83e4c 100644
--- a/ase/awk/run.c
+++ b/ase/awk/run.c
@@ -1,5 +1,5 @@
 /*
- * $Id: run.c,v 1.338 2007-03-03 14:44:31 bacon Exp $
+ * $Id: run.c,v 1.339 2007-03-04 06:26:45 bacon Exp $
  *
  * {License}
  */
@@ -2344,7 +2344,8 @@ static int __run_delete (ase_awk_run_t* run, ase_awk_nde_delete_t* nde)
 				errarg.ptr = var->id.name; 
 				errarg.len = var->id.name_len;
 				ase_awk_setrunerror (
-					run, ASE_AWK_ENOTDEL, var->line, &errarg, 1);
+					run, ASE_AWK_ENOTDEL, var->line,
+					&errarg, 1);
 				return -1;
 			}
 
diff --git a/ase/awk/tree.c b/ase/awk/tree.c
index 5183490e..980691fd 100644
--- a/ase/awk/tree.c
+++ b/ase/awk/tree.c
@@ -1,5 +1,5 @@
 /*
- * $Id: tree.c,v 1.104 2007-02-24 14:31:44 bacon Exp $
+ * $Id: tree.c,v 1.105 2007-03-04 06:26:45 bacon Exp $
  *
  * {License}
  */
@@ -236,14 +236,13 @@ static int __print_expression (ase_awk_t* awk, ase_awk_nde_t* nde)
 		{
 			if (((ase_awk_nde_int_t*)nde)->str == ASE_NULL)
 			{
-				ase_char_t tmp[ASE_SIZEOF(ase_long_t)*8+2]; 
 				ase_size_t n;
 
 				n = ase_awk_longtostr (
-					((ase_awk_nde_int_t*)nde)->val,
-					10, ASE_NULL, tmp, ASE_COUNTOF(tmp));
+					((ase_awk_nde_int_t*)nde)->val, 10, ASE_NULL, 
+					awk->tmp.fmt, ASE_COUNTOF(awk->tmp.fmt));
 
-				PUT_SRCSTRX (awk, tmp, n);
+				PUT_SRCSTRX (awk, awk->tmp.fmt, n);
 			}
 			else
 			{
@@ -258,21 +257,20 @@ static int __print_expression (ase_awk_t* awk, ase_awk_nde_t* nde)
 		{
 			if (((ase_awk_nde_real_t*)nde)->str == ASE_NULL)
 			{
-				ase_char_t tmp[256];
 			#if (ASE_SIZEOF_LONG_DOUBLE != 0)
 				awk->prmfns.misc.sprintf (
 					awk->prmfns.misc.custom_data,
-					tmp, ASE_COUNTOF(tmp), ASE_T("%Lf"), 
+					awk->tmp.fmt, ASE_COUNTOF(awk->tmp.fmt), ASE_T("%Lf"), 
 					(long double)((ase_awk_nde_real_t*)nde)->val);
 			#elif (ASE_SIZEOF_DOUBLE != 0)
 				awk->prmfns.misc.sprintf (
 					awk->prmfns.misc.custom_data,
-					tmp, ASE_COUNTOF(tmp), ASE_T("%f"), 
+					awk->tmp.fmt, ASE_COUNTOF(awk->tmp.fmt), ASE_T("%f"), 
 					(double)((ase_awk_nde_real_t*)nde)->val);
 			#else
 				#error unsupported floating-point data type
 			#endif
-				PUT_SRCSTR (awk, tmp);
+				PUT_SRCSTR (awk, awk->tmp.fmt);
 			}
 			else
 			{
@@ -343,7 +341,6 @@ static int __print_expression (ase_awk_t* awk, ase_awk_nde_t* nde)
 
 		case ASE_AWK_NDE_ARGIDX:
 		{
-			ase_char_t tmp[ASE_SIZEOF(ase_long_t)*8+2]; 
 			ase_size_t n;
 			ase_awk_nde_var_t* px = (ase_awk_nde_var_t*)nde;
 			ASE_AWK_ASSERT (awk, px->id.idxa != (ase_size_t)-1);
@@ -351,8 +348,9 @@ static int __print_expression (ase_awk_t* awk, ase_awk_nde_t* nde)
 
 			PUT_SRCSTR (awk, ASE_T("__param"));
 			n = ase_awk_longtostr (
-				px->id.idxa, 10, ASE_NULL, tmp, ASE_COUNTOF(tmp));
-			PUT_SRCSTRX (awk, tmp, n);
+				px->id.idxa, 10, ASE_NULL,
+				awk->tmp.fmt, ASE_COUNTOF(awk->tmp.fmt));
+			PUT_SRCSTRX (awk, awk->tmp.fmt, n);
 			PUT_SRCSTR (awk, ASE_T("["));
 			PRINT_EXPRESSION_LIST (awk, px->idx);
 			PUT_SRCSTR (awk, ASE_T("]"));
@@ -438,7 +436,6 @@ static int __print_expression (ase_awk_t* awk, ase_awk_nde_t* nde)
 
 		case ASE_AWK_NDE_LOCAL:
 		{
-			ase_char_t tmp[ASE_SIZEOF(ase_long_t)*8+2]; 
 			ase_size_t n;
 			ase_awk_nde_var_t* px = (ase_awk_nde_var_t*)nde;
 
@@ -446,9 +443,9 @@ static int __print_expression (ase_awk_t* awk, ase_awk_nde_t* nde)
 			{
 				PUT_SRCSTR (awk, ASE_T("__local"));
 				n = ase_awk_longtostr (
-					px->id.idxa, 10, 
-					ASE_NULL, tmp, ASE_COUNTOF(tmp));
-				PUT_SRCSTRX (awk, tmp, n);
+					px->id.idxa, 10, ASE_NULL, 
+					awk->tmp.fmt, ASE_COUNTOF(awk->tmp.fmt));
+				PUT_SRCSTRX (awk, awk->tmp.fmt, n);
 			}
 			else 
 			{
@@ -460,7 +457,6 @@ static int __print_expression (ase_awk_t* awk, ase_awk_nde_t* nde)
 
 		case ASE_AWK_NDE_LOCALIDX:
 		{
-			ase_char_t tmp[ASE_SIZEOF(ase_long_t)*8+2]; 
 			ase_size_t n;
 			ase_awk_nde_var_t* px = (ase_awk_nde_var_t*)nde;
 
@@ -468,9 +464,9 @@ static int __print_expression (ase_awk_t* awk, ase_awk_nde_t* nde)
 			{
 				PUT_SRCSTR (awk, ASE_T("__local"));
 				n = ase_awk_longtostr (
-					px->id.idxa, 10, 
-					ASE_NULL, tmp, ASE_COUNTOF(tmp));
-				PUT_SRCSTRX (awk, tmp, n);
+					px->id.idxa, 10, ASE_NULL, 
+					awk->tmp.fmt, ASE_COUNTOF(awk->tmp.fmt));
+				PUT_SRCSTRX (awk, awk->tmp.fmt, n);
 				PUT_SRCSTR (awk, ASE_T("["));
 			}
 			else 
@@ -587,7 +583,6 @@ static int __print_statements (ase_awk_t* awk, ase_awk_nde_t* tree, int depth)
 
 			case ASE_AWK_NDE_BLK:
 			{
-				ase_char_t tmp[ASE_SIZEOF(ase_long_t)*8+2];
 				ase_size_t n;
 				ase_awk_nde_blk_t* px = (ase_awk_nde_blk_t*)p;
 
@@ -604,15 +599,17 @@ static int __print_statements (ase_awk_t* awk, ase_awk_nde_t* tree, int depth)
 					{
 						PUT_SRCSTR (awk, ASE_T("__local"));
 						n = ase_awk_longtostr (
-							i, 10, ASE_NULL, tmp, ASE_COUNTOF(tmp));
-						PUT_SRCSTRX (awk, tmp, n);
+							i, 10, ASE_NULL, 
+							awk->tmp.fmt, ASE_COUNTOF(awk->tmp.fmt));
+						PUT_SRCSTRX (awk, awk->tmp.fmt, n);
 						PUT_SRCSTR (awk, ASE_T(", "));
 					}
 
 					PUT_SRCSTR (awk, ASE_T("__local"));
 					n = ase_awk_longtostr (
-						i, 10, ASE_NULL, tmp, ASE_COUNTOF(tmp));
-					PUT_SRCSTRX (awk, tmp, n);
+						i, 10, ASE_NULL, 
+						awk->tmp.fmt, ASE_COUNTOF(awk->tmp.fmt));
+					PUT_SRCSTRX (awk, awk->tmp.fmt, n);
 					PUT_SRCSTR (awk, ASE_T(";"));
 					PUT_NEWLINE (awk);
 				}
diff --git a/ase/test/awk/err-007.awk b/ase/test/awk/err-007.awk
new file mode 100644
index 00000000..875970ee
--- /dev/null
+++ b/ase/test/awk/err-007.awk
@@ -0,0 +1,4 @@
+
+function substr ()
+{
+}
diff --git a/ase/test/awk/err-008.awk b/ase/test/awk/err-008.awk
new file mode 100644
index 00000000..36d700f5
--- /dev/null
+++ b/ase/test/awk/err-008.awk
@@ -0,0 +1,6 @@
+
+BEGIN {
+	local substr;
+	substr = 20;
+}
+
diff --git a/ase/test/awk/err-009.awk b/ase/test/awk/err-009.awk
new file mode 100644
index 00000000..b90f55fb
--- /dev/null
+++ b/ase/test/awk/err-009.awk
@@ -0,0 +1,19 @@
+
+func abc ()
+{
+
+	local x;
+	print x = 20;
+
+	{
+		local abc;
+
+		abc = 30;
+		print abc;
+		abc ();
+	}
+}
+
+BEGIN {
+	abc ();
+}
diff --git a/ase/test/awk/err-010.awk b/ase/test/awk/err-010.awk
new file mode 100644
index 00000000..e59a23f3
--- /dev/null
+++ b/ase/test/awk/err-010.awk
@@ -0,0 +1,15 @@
+
+global abc;
+
+func abc ()
+{
+	local abc;
+
+	abc = 20;
+	print abc;
+	abc ();
+}
+
+BEGIN {
+	abc ();
+}
diff --git a/ase/test/awk/err-011.awk b/ase/test/awk/err-011.awk
new file mode 100644
index 00000000..d8dd77ea
--- /dev/null
+++ b/ase/test/awk/err-011.awk
@@ -0,0 +1,13 @@
+
+func abc (x)
+{
+	local x;
+
+	x = 20;
+	print x;
+	abc ();
+}
+
+BEGIN {
+	abc ();
+}
diff --git a/ase/test/awk/err-012.awk b/ase/test/awk/err-012.awk
new file mode 100644
index 00000000..3382d7ed
--- /dev/null
+++ b/ase/test/awk/err-012.awk
@@ -0,0 +1,14 @@
+
+func abc ()
+{
+	local j ;
+
+	j = 20;
+	print j;
+	abc ();
+}
+
+global abc; 
+BEGIN {
+	abc ();
+}
diff --git a/ase/test/awk/err-013.awk b/ase/test/awk/err-013.awk
new file mode 100644
index 00000000..2acc1f7d
--- /dev/null
+++ b/ase/test/awk/err-013.awk
@@ -0,0 +1,3 @@
+func abc (abc)
+{
+}