diff --git a/fhem/FHEM/10_CUL_HM.pm b/fhem/FHEM/10_CUL_HM.pm
index 271ae2fcc..ccde67c1d 100755
--- a/fhem/FHEM/10_CUL_HM.pm
+++ b/fhem/FHEM/10_CUL_HM.pm
@@ -5982,6 +5982,10 @@ sub CUL_HM_statCntRfresh($) {# update statistic once a day
 
 sub CUL_HM_respPendRm($) {#del response related entries in messageing entity
   my ($hash) =  @_;
+  if (!defined($hash->{DEF})){ 
+    Log 1,"CUL_HM error removing pending commands";#General remove once found
+    return;
+  }
   $modules{CUL_HM}{prot}{rspPend}-- if($hash->{helper}{prt}{rspWait}{cmd});
   delete $hash->{helper}{prt}{rspWait};
   delete $hash->{helper}{prt}{wuReSent};
@@ -5993,9 +5997,14 @@ sub CUL_HM_respPendRm($) {#del response related entries in messageing entity
   $respRemoved = 1;
 }
 sub CUL_HM_respPendTout($) {
-  my ($HMid) =  @_;
-  (undef,$HMid) = split(":",$HMid,2);
+  my ($HMidIn) =  @_;
+  my(undef,$HMid) = split(":",$HMidIn,2);
   my $hash = $modules{CUL_HM}{defptr}{$HMid};
+  if (!defined($hash)){ 
+    Log 1,"CUL_HM error removing timer for $HMidIn";#General remove once found
+    return;
+  }
+ 
   my $pHash = $hash->{helper}{prt};#shortcut
   if ($hash && $hash->{DEF} ne '000000'){# we know the device
     my $name = $hash->{NAME};