diff --git a/FHEM/00_HMLAN.pm b/FHEM/00_HMLAN.pm
index 4700cd41a..0ddb67d6d 100755
--- a/FHEM/00_HMLAN.pm
+++ b/FHEM/00_HMLAN.pm
@@ -105,6 +105,7 @@ sub HMLAN_Define($$) {#########################################################
   $hash->{DeviceName} = $dev;
   $hash->{msgKeepAlive} = "";   # delay of trigger Alive messages
   $hash->{helper}{k}{DlyMax} = 0;
+  $hash->{helper}{k}{BufMin} = 30;
   
   $hash->{helper}{q}{answerPend} = 0;#pending answers from LANIf
   my @arr = ();
@@ -491,15 +492,6 @@ sub HMLAN_Parse($$) {##########################################################
 	  if    ($stat & 0x03 && $dst eq $attr{$name}{hmId}){HMLAN_qResp($hash,$src,0);}
 	  elsif ($stat & 0x08 && $src eq $attr{$name}{hmId}){HMLAN_qResp($hash,$dst,0);}
 	  
-#	  HMLAN_UpdtMsgLoad($name,(($stat & 0x09)?(($stat & 0x08)?2 #2 repetitions
-#	                                                         :1)#one ack
-#	                                         :0)                #no ack
-#							  *((hex($flg)&0x10)?17             #burst=17units
-#							                    :1));           #ACK=1 unit
-#	  HMLAN_UpdtMsgLoad($name,(($stat & 0x08)?2       #2 repetitions
-#	                                         :0)      #one ack
-#							  *((hex($flg)&0x10)?17   #burst=17units
-#							                    :1)); #ACK=1 unit
 	  HMLAN_UpdtMsgLoad($name,((hex($flg)&0x10)?34   #burst=17units *2
 							                   :2))  #ACK=1 unit *2
 		  if (($stat & 0x48) == 8);# reject - but not from repeater
diff --git a/FHEM/10_CUL_HM.pm b/FHEM/10_CUL_HM.pm
index 5ea09a5e9..47fdcca21 100755
--- a/FHEM/10_CUL_HM.pm
+++ b/FHEM/10_CUL_HM.pm
@@ -1591,6 +1591,7 @@ sub CUL_HM_parseCommon(@){#####################################################
 	}
 	
 	if   ($subType =~ m/^8/){#NACK
+	  #84 : request undefined register
 	  $success = "no";
 	  CUL_HM_eventP($shash,"Nack");
 	  $reply = "NACK"; 
@@ -3214,7 +3215,7 @@ sub CUL_HM_valvePosUpdt(@) {#update valve position periodically to please valve
 
 #  if ($updtValveCnt++ %2){
 #    $nextTimer = 20;
-#    CUL_HM_PushCmdStack($hash,"++8670".$vDevId."00000000D036");# some weather event - 
+#    CUL_HM_PushCmdStack($hash,"++8670".$vDevId."00000000D036");# some weather event -
 #  }
 #  else{
     my $name = $hash->{NAME};
@@ -3957,6 +3958,8 @@ sub CUL_HM_IOid($) {#in: hash out: id of IO device
   my $dHash = CUL_HM_getDeviceHash($hash);
   my $ioHash = $dHash->{IODev};
   my $fhtid = defined($ioHash->{FHTID}) ? $ioHash->{FHTID} : "0000";
+  return "" if (!$ioHash->{NAME});
+  return AttrVal($ioHash->{NAME},"hmId","F1$fhtid");  
   return $attr{$ioHash->{NAME}}{hmId}?$attr{$ioHash->{NAME}}{hmId}:"F1$fhtid";
 }
 sub CUL_HM_hash2Id($) {#in: id, out:hash
@@ -4918,13 +4921,15 @@ sub CUL_HM_procQs($){#process non-wakeup queues
     if   (@{$mq->{$q}}){
 	  my $devN = ${$mq->{$q}}[0]; 
 	  my $ioName = $defs{$devN}{IODev}{NAME};
-	  if (   (   ReadingsVal($ioName,"cond","") =~ m /^(ok|Overload-released|init)$/
+	  if (   (   $ioName
+              && ReadingsVal($ioName,"cond","") =~ m /^(ok|Overload-released|init)$/
 	          && $q eq "qReqStat")
 		   ||(   CUL_HM_autoReadReady($ioName)
 	          && $q eq "qReqConf")){
         my $dq = $defs{$devN}{helper}{q};
         my @chns = split(",",$dq->{$q});
-	    if (@chns > 1){$dq->{$q} = join ",",@chns[1..@chns];}
+	    my $nOpen = scalar @chns;
+	    if (@chns > 1){$dq->{$q} = join ",",@chns[1..$nOpen-1];}
 	    else{          $dq->{$q} = "";
 	                   @{$mq->{$q}} = grep !/^$devN$/,@{$mq->{$q}};
 	    }
@@ -4986,7 +4991,7 @@ sub CUL_HM_appFromQ($$){#stack commands if pend in WuQ
 	  if ($dq->{$q} ne ""){# need update
         my @chns = split(",",$dq->{$q});
 	    my $nOpen = scalar @chns;
-	    if ($nOpen > 1){$dq->{$q} = join ",",@chns[1..$nOpen];}
+	    if ($nOpen > 1){$dq->{$q} = join ",",@chns[1..$nOpen-1];}
 	    else{           $dq->{$q} = "";
 	                  @{$modules{CUL_HM}{helper}{$q."Wu"}} = 
 	                     grep !/^$devN$/,@{$modules{CUL_HM}{helper}{$q."Wu"}};
@@ -5006,7 +5011,8 @@ sub CUL_HM_autoReadReady($){# capacity for autoread available?
       && $defs{$mHlp->{autoRdActive}}){
     return 0 if ($defs{$mHlp->{autoRdActive}}{helper}{prt}{sProc} == 1); # predecessor still on
   }
-  if (  ReadingsVal($ioName,"cond","") !~ m /^(ok|Overload-released|init)$/
+  if (   !$ioName 
+      || ReadingsVal($ioName,"cond","") !~ m /^(ok|Overload-released|init)$/
 	  || (    $defs{$ioName}{helper}{q}
 		  && ($defs{$ioName}{helper}{q}{cap}{sum}/16.8)>
 		       AttrVal($ioName,"hmMsgLowLimit",40))){
diff --git a/FHEM/98_HMinfo.pm b/FHEM/98_HMinfo.pm
index 6c28e947a..a82865728 100644
--- a/FHEM/98_HMinfo.pm
+++ b/FHEM/98_HMinfo.pm
@@ -696,7 +696,7 @@ sub HMinfo_status($){##########################################################
 	}
     if ($ehash->{helper}{role}{dev}){#---restrict to devices
 	  $nbrD++;
-	  push @IOdev,$ehash->{IODev}{NAME} if($ehash->{IODev});
+	  push @IOdev,$ehash->{IODev}{NAME} if($ehash->{IODev} && $ehash->{IODev}{NAME});
 	  push @Anames,$eName if ($attr{$eName}{actStatus} && $attr{$eName}{actStatus} ne "alive");
       foreach (grep {$ehash->{"prot".$_}} keys %protE){#protocol events reported
 	    $protE{$_}++;
diff --git a/fhem.pl b/fhem.pl
index 56ce3f89c..45bcb6cbe 100755
--- a/fhem.pl
+++ b/fhem.pl
@@ -2131,7 +2131,9 @@ CommandSetstate($$)
         next;
       }
 
-      if(!$d->{READINGS}{$sname} || $d->{READINGS}{$sname}{TIME} lt $tim) {
+	  if(   !$d->{READINGS}{$sname} 
+	     || !$d->{READINGS}{$sname}{TIME} #General
+		 || $d->{READINGS}{$sname}{TIME} lt $tim) {
         $d->{READINGS}{$sname}{VAL} = $sval;
         $d->{READINGS}{$sname}{TIME} = $tim;
       }