diff --git a/apps/fft-multi-decoder_fixed_hackrf.grc b/apps/fft-multi-decoder_fixed_hackrf.grc
index 6f15ef8..877d4c1 100644
--- a/apps/fft-multi-decoder_fixed_hackrf.grc
+++ b/apps/fft-multi-decoder_fixed_hackrf.grc
@@ -1217,7 +1217,7 @@
     </param>
     <param>
       <key>gui_hint</key>
-      <value></value>
+      <value>tabs@0</value>
     </param>
     <param>
       <key>_rotation</key>
diff --git a/apps/read_sync_decim.grc b/apps/read_sync_decim.grc
index c8b4e2c..a160c7b 100644
--- a/apps/read_sync_decim.grc
+++ b/apps/read_sync_decim.grc
@@ -344,7 +344,7 @@
     </param>
     <param>
       <key>file</key>
-      <value>/tmp/cr/sync_decim_out_11221</value>
+      <value>/user/wire2/richter/abgabe/crash-examples/tmc decoder crash/sync_decim_out_11221</value>
     </param>
     <param>
       <key>_coordinate</key>
@@ -777,7 +777,7 @@ class blk(gr.sync_block):  # other base classes are basic_block, decim_block, in
     </param>
     <param>
       <key>writeDB</key>
-      <value>True</value>
+      <value>False</value>
     </param>
   </block>
   <block>
diff --git a/python/tmc_classes.py b/python/tmc_classes.py
index c0be51e..1ca13b7 100644
--- a/python/tmc_classes.py
+++ b/python/tmc_classes.py
@@ -613,9 +613,7 @@ class tmc_dict:
                     return False
         return True        
     def add(self,message):
-        self.list_lock.acquire()
-        self.message_list.append(message)
-        self.list_lock.release()
+        print_message=True
         self.dict_lock.acquire()
         try:
             lcn=message.location.lcn
@@ -625,19 +623,26 @@ class tmc_dict:
             if message.event.is_cancellation:
                 try:
                     self.messages[lcn][updateClass].cancellation_time=message.getTime()#cancellation_time = rx time of cancellation message
+                    print_message=False#dont print cancellation messages
                 except KeyError:#no message to cancel
                     message.event.name="no message to cancel"
                     self.messages[lcn][updateClass]=message
             else:
                 if  self.messages[lcn].has_key(updateClass) and self.messages[lcn][updateClass].tmc_hash ==message.tmc_hash:#if same message -> add confirmation
                     self.messages[lcn][updateClass].add_confirmation(message)
+                    print_message=False#dont print repeats
                 else:#(over)write message
                     self.messages[lcn][updateClass]=message
             #print("added message: "+str(message))
+            if print_message:
+              self.list_lock.acquire()
+              self.message_list.append(message)
+              self.list_lock.release()
         except AttributeError:
             print("ERROR, not adding: "+str(message))
         finally:
             self.dict_lock.release()
+        return print_message
     def getLogString(self,showInvalid,filters):
         self.list_lock.acquire()
         retStr=""
@@ -790,7 +795,7 @@ class tmc_message:
     def log_string(self):
         retstr=""
         try:
-            retstr=str(self.event.updateClass)+": "+self.getTime()+": "+self.location_text()+": "+self.events_string()+"; "+self.info_str()+"; "+self.psn
+            retstr=str(self.event.updateClass)+": "+self.getTime()+": "+self.location_text()+": "+self.events_string()+"; "+self.info_str()+"; "+str(list(self.psns))+"x%i"%self.confirmations
         except UnicodeDecodeError as e:
             print e
             code.interact(local=locals())
@@ -885,6 +890,7 @@ class tmc_message:
         tmc_F=int((tmc_x>>3)&0x1) #identifies the message as a Single Group (F = 1) or Multi Group (F = 0)
         self.is_single=(tmc_F==1)
         self.is_multi=(tmc_F==0)
+        
         #check LTN
         try:
             msg_ltn=ltn#tableobj.RDS_data[PI]["AID_list"][52550]["LTN"]
@@ -913,6 +919,7 @@ class tmc_message:
                 self.ci=int(tmc_x&0x7) #continuity index
                 self.data_arr=BitArray()
                 self.mgm_list=[]
+                #self.length=0# attribute error is catched and signals incomplete mgm
             self.location=tmc_location(tmc_z,tableobj)
             #self.event=int(tmc_y&0x7ff) #Y10-Y0
             self.event=tmc_event(int(tmc_y&0x7ff),self.tableobj) #Y10-Y0
diff --git a/python/tmc_parser.py b/python/tmc_parser.py
index a1199a5..9c96170 100644
--- a/python/tmc_parser.py
+++ b/python/tmc_parser.py
@@ -176,18 +176,20 @@ class tmc_parser(gr.sync_block):
                 if tmc_F==1:#single group
                     tmc_msg=tmc_message(PI,psn,ltn,tmc_x,tmc_y,tmc_z,datetime_received,self)
                     self.dataLock.acquire(1)
-                    self.tmc_messages.add(tmc_msg)
+                    print_message=self.tmc_messages.add(tmc_msg)
                     self.dataLock.release(1)
-                    self.print_tmc_msg(tmc_msg)
+                    if print_message:#ignore duplicates
+                        self.print_tmc_msg(tmc_msg)
                 elif tmc_F==0 and Y15==1:#1st group of multigroup
                     ci=int(tmc_x&0x7)
                     tmc_msg=tmc_message(PI,psn,ltn,tmc_x,tmc_y,tmc_z,datetime_received,self)
                     self.dataLock.acquire(1)
-                    self.tmc_messages.add(tmc_msg)
+                    print_message=self.tmc_messages.add(tmc_msg)
                     self.dataLock.release(1)
                     #if  self.RDS_data[PI]["internals"]["unfinished_TMC"].has_key(ci):
                         #print("overwriting parital message")
-                    self.unfinished_messages[PI][ci]={"msg":tmc_msg,"time":time.time()}
+                    if print_message:#save unfinished message only once (dont overwrite collected additional groups)
+                        self.unfinished_messages[PI][ci]={"msg":tmc_msg,"time":time.time()}
                 else:
                     ci=int(tmc_x&0x7)
                     if self.unfinished_messages[PI].has_key(ci):
@@ -202,6 +204,7 @@ class tmc_parser(gr.sync_block):
                         if tmc_msg.is_complete:
                             self.print_tmc_msg(tmc_msg)#print message
                             self.dataLock.acquire(1)#wait for print before delete
+                            print_dbg("deleted finished (multi-group) message")
                             del self.unfinished_messages[PI][tmc_msg.ci]#delete finished message
                             self.dataLock.release(1)
                     else: