diff --git a/src/entry/Maat_api.cpp b/src/entry/Maat_api.cpp
index c0a63f3..b1c339a 100644
--- a/src/entry/Maat_api.cpp
+++ b/src/entry/Maat_api.cpp
@@ -982,7 +982,11 @@ int Maat_table_callback_register(Maat_feather_t feather,short table_id,
 		pthread_mutex_unlock(&(_feather->background_update_mutex));
 		return -1;
 	}
-
+	if(!_feather->scanner)
+	{
+		pthread_mutex_unlock(&(_feather->background_update_mutex));
+		return 1;
+	}
 	const char* line=NULL;
 	struct Maat_table_runtime* table_rt=NULL;
 	table_rt=Maat_table_runtime_get(_feather->scanner->table_rt_mgr, table_id);
diff --git a/src/entry/Maat_command.cpp b/src/entry/Maat_command.cpp
index ebe9417..353667b 100644
--- a/src/entry/Maat_command.cpp
+++ b/src/entry/Maat_command.cpp
@@ -2374,7 +2374,7 @@ int Maat_cmd_commit(Maat_feather_t feather)
 {
 	_Maat_feather_t* _feather=(_Maat_feather_t*)feather;
 
-	int ret=0,i=0;
+	int ret=-1, i=0;
 	int new_region_num=0,new_group_num=0;
 	int serial_rule_num=0,serial_rule_idx=0;
 	UNUSED int transaction_success=1;
@@ -2386,7 +2386,7 @@ int Maat_cmd_commit(Maat_feather_t feather)
 	struct serial_rule_t* s_rule=NULL;
 	if(_feather->input_mode!=SOURCE_REDIS)
 	{
-		return -1;
+		return ret;
 	}
 	if(_feather->cmd_q_cnt==0)
 	{
@@ -2414,7 +2414,6 @@ int Maat_cmd_commit(Maat_feather_t feather)
 		if(data_reply->type!=REDIS_REPLY_INTEGER)
 		{
 			freeReplyObject(data_reply);
-			ret=-1;
 			goto error_out;
 		}
 		_feather->base_rgn_seq=data_reply->integer-new_region_num;
@@ -2424,7 +2423,6 @@ int Maat_cmd_commit(Maat_feather_t feather)
 		if(data_reply->type!=REDIS_REPLY_INTEGER)
 		{
 			freeReplyObject(data_reply);
-			ret=-1;
 			goto error_out;
 		}
 		_feather->base_grp_seq=data_reply->integer-new_group_num;
diff --git a/src/entry/Maat_rule.cpp b/src/entry/Maat_rule.cpp
index 18ba8d3..d0eb3e8 100644
--- a/src/entry/Maat_rule.cpp
+++ b/src/entry/Maat_rule.cpp
@@ -33,7 +33,7 @@
 #include "stream_fuzzy_hash.h"
 #include "gram_index_engine.h"
 
-int MAAT_FRAME_VERSION_2_8_20190816=1;
+int MAAT_FRAME_VERSION_2_8_20190827=1;
 
 int is_valid_table_name(const char* str)
 {