diff --git a/src/entry/Maat_api.cpp b/src/entry/Maat_api.cpp
index cf762db..c3b335d 100644
--- a/src/entry/Maat_api.cpp
+++ b/src/entry/Maat_api.cpp
@@ -155,8 +155,9 @@ int region_compile(_Maat_feather_t*feather,struct _INNER_scan_status_t *_mid,int
 		scan_ret=shortcut_avilable_cnt;
 		alignment_int64_array_add(feather->orphan_group_saving, thread_num, 1);
 	}
-	else if(shortcut_avilable_cnt==0&&region_hit_num==1&&_mid->hit_group_cnt==1&&is_last_region==1)
+	else if(0&&shortcut_avilable_cnt==0&&region_hit_num==1&&_mid->hit_group_cnt==1&&is_last_region==1)
 	{
+		//This shortcut is NO longger valid after bool macher support NOT-logic.
 		//short cut for last scan and combination rules
 		//region_hit_num==1 :  for current scan hitted rules, one and each other group may statisfy a compile rule.
 		//_mid->hit_group_cnt==1: With pre scan hitted group rules, one group may staisfy a compile rule
@@ -179,7 +180,7 @@ int region_compile(_Maat_feather_t*feather,struct _INNER_scan_status_t *_mid,int
 		
 		if(0==pthread_rwlock_tryrdlock(&(_mi_rule->rwlock)))
 		{
-			if(_mi_rule->is_valid==1)
+			if(_mi_rule->is_valid==1 && !(_mi_rule->not_group_cnt>0 && !is_last_region))
 			{
    				make_group_set(_mi_rule, &(rs_result[result_cnt].group_set), &has_not_flag);
 				r_in_c_cnt=pickup_hit_region_from_compile(&(rs_result[result_cnt].group_set), _mid->cur_hit_id, _mid->cur_hit_cnt,
diff --git a/src/entry/Maat_rule.cpp b/src/entry/Maat_rule.cpp
index abd0711..29c2dc3 100644
--- a/src/entry/Maat_rule.cpp
+++ b/src/entry/Maat_rule.cpp
@@ -1802,6 +1802,7 @@ int add_group_to_compile(struct Maat_compile_inner_t*a_compile_rule,struct Maat_
 	if(not_flag)
 	{
 		a_compile_rule->not_flag[write_pos]=1;
+		a_compile_rule->not_group_cnt++;
 	}
 	else
 	{
@@ -1853,7 +1854,11 @@ struct Maat_group_inner_t* del_group_from_compile(struct Maat_compile_inner_t*a_
 		{
 			group_rule->ref_cnt--;
 			dynamic_array_write(a_compile_rule->groups,i,NULL);
-			a_compile_rule->not_flag[i]=0;
+			if(a_compile_rule->not_flag[i]==1)
+			{
+				a_compile_rule->not_group_cnt--;
+				a_compile_rule->not_flag[i]=0;
+			}
 			a_compile_rule->group_cnt--;
 			pthread_rwlock_unlock(&(a_compile_rule->rwlock));
 			return group_rule;
diff --git a/src/inc_internal/Maat_rule_internal.h b/src/inc_internal/Maat_rule_internal.h
index 9ef0f8a..27a7d38 100644
--- a/src/inc_internal/Maat_rule_internal.h
+++ b/src/inc_internal/Maat_rule_internal.h
@@ -147,7 +147,8 @@ struct Maat_compile_inner_t
 	struct db_compile_rule_t *db_c_rule;
 	dynamic_array_t *groups;	//element is struct Maat_group_inner_t*
 	char not_flag[MAX_ITEMS_PER_BOOL_EXPR];
-	int is_valid;
+	char not_group_cnt;
+	char is_valid;
 	int compile_id;//equal to db_c_rule->m_rule.config_id
 	const struct Maat_table_desc* ref_table;
 	int group_boundary;
diff --git a/test/test_maatframe.cpp b/test/test_maatframe.cpp
index 2012686..78a6cb1 100644
--- a/test/test_maatframe.cpp
+++ b/test/test_maatframe.cpp
@@ -303,12 +303,14 @@ TEST(Boolmatcher, NotFlagGroup)
 	table_id=Maat_table_register(g_feather,table_name);
 	ASSERT_GT(table_id, 0);
 	
+	Maat_set_scan_status(g_feather, &mid, MAAT_SET_SCAN_LAST_REGION,  NULL, 0);
 	ret=Maat_full_scan_string(g_feather, table_id,CHARSET_GBK, string_should_hit, strlen(string_should_hit), 
 						result,found_pos, 4, &mid, 0);
 						
 	EXPECT_GE(ret, 1);
 	Maat_clean_status(&mid);
 
+	Maat_set_scan_status(g_feather, &mid, MAAT_SET_SCAN_LAST_REGION,  NULL, 0);
 	ret=Maat_full_scan_string(g_feather, table_id,CHARSET_GBK, string_should_not_hit, strlen(string_should_not_hit), 
 						result,found_pos, 4, &mid, 0);