diff --git a/server/LAUNCH.sh b/server/LAUNCH.sh
index 75fa2fc..5a10d32 100755
--- a/server/LAUNCH.sh
+++ b/server/LAUNCH.sh
@@ -74,7 +74,7 @@ function launching_workers {
 
     screen -S "Workers_D4" -X screen -t "1_workers_manager" bash -c "cd ${D4_HOME}/workers/workers_1; ./workers_manager.py; read x"
     sleep 0.1
-    screen -S "Workers_D4" -X screen -t "2_workers_manager" bash -c "cd ${D4_HOME}/workers/workers_4; ./workers_manager.py; read x"
+    screen -S "Workers_D4" -X screen -t "4_workers_manager" bash -c "cd ${D4_HOME}/workers/workers_4; ./workers_manager.py; read x"
     sleep 0.1
 }
 
@@ -266,7 +266,8 @@ while [ "$1" != "" ]; do
     case $1 in
         -l | --launchAuto )         launch_all;
                                     ;;
-        -k | --killAll )            killall;
+        -k | --killAll )            helptext;
+                                    killall;
                                     ;;
         -h | --help )               helptext;
                                     exit
diff --git a/server/configs/6379.conf b/server/configs/6379.conf
index d799cd1..8c7c469 100644
--- a/server/configs/6379.conf
+++ b/server/configs/6379.conf
@@ -174,7 +174,7 @@ rdbcompression yes
 rdbchecksum yes
 
 # The filename where to dump the DB
-dbfilename dump.rdb
+dbfilename dump6379.rdb
 
 # The working directory.
 #
diff --git a/server/configs/6380.conf b/server/configs/6380.conf
index b99e918..db3234f 100644
--- a/server/configs/6380.conf
+++ b/server/configs/6380.conf
@@ -174,7 +174,7 @@ rdbcompression yes
 rdbchecksum yes
 
 # The filename where to dump the DB
-dbfilename dump.rdb
+dbfilename dump6880.rdb
 
 # The working directory.
 #
diff --git a/server/server.py b/server/server.py
index bbf7fd3..d476935 100755
--- a/server/server.py
+++ b/server/server.py
@@ -29,7 +29,7 @@ timeout_time = 30
 
 header_size = 62
 
-data_default_size_limit = 100000
+data_default_size_limit = 1000000
 default_max_entries_by_stream = 10000
 
 host_redis_stream = "localhost"
@@ -113,7 +113,14 @@ class Echo(Protocol, TimeoutMixin):
             # check default size limit
             if data_header['size'] > data_default_size_limit:
                 self.transport.abortConnection()
-                logger.warning('Incorrect data size: the server received more data than expected by default, expected={}, received={} , uuid={}, session_uuid={}'.format(data_default_size_limit, data_header['size'] ,data_header['uuid_header'], self.session_uuid))
+                logger.warning('Incorrect header data size: the server received more data than expected by default, expected={}, received={} , uuid={}, session_uuid={}'.format(data_default_size_limit, data_header['size'] ,data_header['uuid_header'], self.session_uuid))
+
+            # Worker: Incorrect type
+            if redis_server_stream.sismember('Error:IncorrectType:{}'.format(data_header['type']), self.session_uuid):
+                self.transport.abortConnection()
+                redis_server_stream.delete(stream_name)
+                redis_server_stream.srem('Error:IncorrectType:{}'.format(data_header['type']), self.session_uuid)
+                logger.warning('Incorrect type={} detected by worker, uuid={}, session_uuid={}'.format(data_header['type'] ,data_header['uuid_header'], self.session_uuid))
 
         return data_header
 
diff --git a/server/workers/workers_1/worker.py b/server/workers/workers_1/worker.py
index 0a7745b..0d89030 100755
--- a/server/workers/workers_1/worker.py
+++ b/server/workers/workers_1/worker.py
@@ -8,18 +8,36 @@ import subprocess
 
 import datetime
 
-def data_incorrect_format(session_uuid):
+def data_incorrect_format(stream_name, session_uuid, uuid):
+    redis_server_stream.sadd('Error:IncorrectType:{}'.format(type), session_uuid)
+    redis_server_metadata.hset('metadata_uuid:{}'.format(uuid), 'Error', 'Error: Type={}, Incorrect file format'.format(type))
+    clean_stream(stream_name, session_uuid)
     print('Incorrect format')
     sys.exit(1)
 
+def clean_stream(stream_name, session_uuid):
+    redis_server_stream.srem('ended_session', session_uuid)
+    redis_server_stream.srem('session_uuid:{}'.format(type), session_uuid)
+    redis_server_stream.srem('working_session_uuid:{}'.format(type), session_uuid)
+    redis_server_stream.hdel('map-type:session_uuid-uuid:{}'.format(type), session_uuid)
+    redis_server_stream.delete(stream_name)
+
 host_redis_stream = "localhost"
 port_redis_stream = 6379
 
+host_redis_metadata = "localhost"
+port_redis_metadata = 6380
+
 redis_server_stream = redis.StrictRedis(
                     host=host_redis_stream,
                     port=port_redis_stream,
                     db=0)
 
+redis_server_metadata = redis.StrictRedis(
+                    host=host_redis_metadata,
+                    port=port_redis_metadata,
+                    db=0)
+
 type = 1
 tcp_dump_cycle = '300'
 stream_buffer = 100
@@ -51,7 +69,7 @@ if __name__ == "__main__":
     redis_server_stream.sadd('working_session_uuid:{}'.format(type), session_uuid)
 
     #LAUNCH a tcpdump
-    process = subprocess.Popen(["tcpdump", '-n', '-r', '-', '-G', tcp_dump_cycle, '-w', '{}/%Y/%m/%d/{}-%Y-%m-%d-%H%M%S.cap'.format(tcpdump_path, uuid)], stdin=subprocess.PIPE)
+    process = subprocess.Popen(["tcpdump", '-n', '-r', '-', '-G', tcp_dump_cycle, '-w', '{}/%Y/%m/%d/{}-%Y-%m-%d-%H%M%S.cap'.format(tcpdump_path, uuid)], stdin=subprocess.PIPE, stderr=subprocess.PIPE)
     nb_save = 0
 
     while True:
@@ -78,7 +96,7 @@ if __name__ == "__main__":
                     except:
                         Error_message = process.stderr.read()
                         if Error_message == b'tcpdump: unknown file format\n':
-                            data_incorrect_format(session_uuid)
+                            data_incorrect_format(stream_name, session_uuid, uuid)
 
                         #print(process.stdout.read())
                     nb_save += 1
@@ -95,7 +113,7 @@ if __name__ == "__main__":
                 out, err = process.communicate(timeout= 0.5)
                 #print(out)
                 if err == b'tcpdump: unknown file format\n':
-                    data_incorrect_format(session_uuid)
+                    data_incorrect_format(stream_name, session_uuid, uuid)
                 elif err:
                     print(err)