diff --git a/src/entry/Maat_rule.cpp b/src/entry/Maat_rule.cpp
index 789e97c..55b8268 100644
--- a/src/entry/Maat_rule.cpp
+++ b/src/entry/Maat_rule.cpp
@@ -26,7 +26,7 @@
 #include "mesa_fuzzy.h"
 #include "great_index_engine.h"
 
-int MAAT_FRAME_VERSION_1_8_20160918_TABLE_CONJ=1;
+int MAAT_FRAME_VERSION_1_8_20160919=1;
 const char *maat_module="MAAT Frame";
 
 const char* CHARSET_STRING[]={"NONE","gbk","big5","unicode","utf8","bin",
diff --git a/src/entry/json2iris.cpp b/src/entry/json2iris.cpp
index d515995..4f745a4 100644
--- a/src/entry/json2iris.cpp
+++ b/src/entry/json2iris.cpp
@@ -12,7 +12,8 @@
 #include "cJSON.h"
 #include "map_str2int.h"
 #include "Maat_rule_internal.h"
-const char* maat_json="maat json";
+const char* maat_json="MAAT JSON";
+const char* untitled_group_name="Untitled";
 const int json_version=1;
 #define	MAX_PATH_LINE	256
 #define	MAX_COLUMN_NUM	32
@@ -758,6 +759,7 @@ int write_iris(cJSON *json,struct iris_description_t *p_iris,void* logger)
 	cJSON *compile_rule=NULL,*group_rule=NULL,*region_rule=NULL,*each_plug_table=NULL;
 	const char* group_name=NULL;
 	struct group_info_t *group_info=NULL;
+	struct group_info_t untitled_group;
 	plug_tables=cJSON_GetObjectItem(json,"plugin_table");
 	if(NULL!=plug_tables)
 	{
@@ -813,11 +815,14 @@ int write_iris(cJSON *json,struct iris_description_t *p_iris,void* logger)
 			item=cJSON_GetObjectItem(group_rule,"group_name");
 			if(item==NULL||item->type!=cJSON_String)
 			{
-				MESA_handle_runtime_log(logger,RLOG_LV_FATAL,maat_json,
-											"compile rule %d's group has no name.",compile_id);
-				return -1;
+				MESA_handle_runtime_log(logger,RLOG_LV_INFO,maat_json,
+											"compile rule %d's group has no name,regard as Untitled.",compile_id);
+				group_name=untitled_group_name;
+			}
+			else
+			{
+				group_name=item->valuestring;
 			}
-			group_name=item->valuestring;
 			group_info=(struct group_info_t*)MESA_htable_search(p_iris->group_name_map, (const unsigned char*)group_name, strlen(group_name));
 			if(group_info!=NULL)//exist group name ,region already read
 			{
@@ -837,11 +842,17 @@ int write_iris(cJSON *json,struct iris_description_t *p_iris,void* logger)
 				}
 				continue;
 			}
-			
-			group_info=(struct group_info_t*)malloc(sizeof(struct group_info_t));
-			group_info->group_id=p_iris->group_cnt++;
-			MESA_htable_add(p_iris->group_name_map,(const unsigned char*)group_name, strlen(group_name),group_info);
-			
+			if(0==strncasecmp(group_name,untitled_group_name,strlen(untitled_group_name)))
+			{
+				group_info=&untitled_group;
+				group_info->group_id=p_iris->group_cnt++;
+			}
+			else
+			{
+				group_info=(struct group_info_t*)malloc(sizeof(struct group_info_t));
+				group_info->group_id=p_iris->group_cnt++;
+				MESA_htable_add(p_iris->group_name_map,(const unsigned char*)group_name, strlen(group_name),group_info);
+			}
 			r_rules=cJSON_GetObjectItem(group_rule,"regions");
 			if(r_rules==NULL)
 			{
diff --git a/test/maat_json.json b/test/maat_json.json
index 0804d84..3384247 100644
--- a/test/maat_json.json
+++ b/test/maat_json.json
@@ -13,7 +13,7 @@
             "is_valid": "yes",
             "groups": [
                 {
-                    "group_name": "group_1",
+                    "group_name": "IP_group",
                     "regions": [
                         {
                             "table_name": "IP_CONFIG",
@@ -52,7 +52,7 @@
                     ]
                 },
                 {
-                    "group_name": "group_2",
+                    "group_name": "Untitled",
                     "regions": [
                         {
                             "table_name": "HTTP_URL",
@@ -79,10 +79,10 @@
             "is_valid": "yes",
             "groups": [
                 {
-                    "group_name": "group_1"
+                    "group_name": "IP_group"
                 },
                 {
-                    "group_name": "group_3",
+                    "group_name": "Untitled",
                     "regions": [
                         {
                             "table_name": "CONTENT_SIZE",
@@ -107,7 +107,6 @@
             "is_valid": "yes",
             "groups": [
                 {
-                    "group_name": "group_4",
                     "regions": [
                         {
                             "table_name": "HTTP_URL",
@@ -134,7 +133,7 @@
             "is_valid": "yes",
             "groups": [
                 {
-                    "group_name": "group_5",
+                    "group_name": "Untitled",
                     "regions": [
                         {
                             "table_name": "HTTP_URL",
@@ -149,7 +148,7 @@
                     ]
                 },
                 {
-                    "group_name": "group_6",
+                    "group_name": "Untitled",
                     "regions": [
                         {
                             "table_name": "CONTENT_SIZE",
@@ -174,7 +173,7 @@
             "is_valid": "yes",
             "groups": [
                 {
-                    "group_name": "group_7",
+                    "group_name": "Untitled",
                     "regions": [
                         {
                             "table_name": "FILE_DIGEST",
@@ -200,7 +199,7 @@
             "is_valid": "yes",
             "groups": [
                 {
-                    "group_name": "group_8",
+                    "group_name": "Untitled",
                     "regions": [
                         {
                             "table_name": "HTTP_REGION",
@@ -228,7 +227,7 @@
             "is_valid": "yes",
             "groups": [
                 {
-                    "group_name": "group_9",
+                    "group_name": "Untitled",
                     "regions": [
                         {
                             "table_name": "HTTP_URL",
@@ -255,7 +254,7 @@
             "is_valid": "yes",
             "groups": [
                 {
-                    "group_name": "group_10",
+                    "group_name": "Untitled",
                     "regions": [
                         {
                             "table_name": "KEYWORDS_TABLE",
@@ -282,7 +281,7 @@
             "is_valid": "yes",
             "groups": [
                 {
-                    "group_name": "group_11",
+                    "group_name": "Untitled",
                     "regions": [
                         {
                             "table_name": "KEYWORDS_TABLE",
@@ -309,7 +308,7 @@
             "is_valid": "yes",
             "groups": [
                 {
-                    "group_name": "group_12",
+                    "group_name": "Untitled",
                     "regions": [
                         {
                             "table_name": "KEYWORDS_TABLE",
@@ -336,7 +335,7 @@
             "is_valid": "yes",
             "groups": [
                 {
-                    "group_name": "group_13",
+                    "group_name": "Untitled",
                     "regions": [
                         {
                             "table_name": "HTTP_HOST",
@@ -364,7 +363,7 @@
             "is_valid": "yes",
             "groups": [
                 {
-                    "group_name": "group_14",
+                    "group_name": "Untitled",
                     "regions": [
                         {
                             "table_name": "HTTP_URL",