From 5adc27878c68ca75e4c20ec3278084c5660eaa95 Mon Sep 17 00:00:00 2001
From: Beta-User <>
Date: Sun, 8 Dec 2019 04:49:25 +0000
Subject: [PATCH] 98_Heating_Control: bugfix in converter code, forum #106085

git-svn-id: https://svn.fhem.de/fhem/trunk/fhem@20678 2b470e98-0d58-463d-a4d8-8e2adae1ed80
---
 FHEM/98_Heating_Control.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/FHEM/98_Heating_Control.pm b/FHEM/98_Heating_Control.pm
index 8b68a4978..3d0876d55 100644
--- a/FHEM/98_Heating_Control.pm
+++ b/FHEM/98_Heating_Control.pm
@@ -136,7 +136,7 @@ sub Heating_Control_ConvertToWDT() {
     my @b = GetAllReadings($hcName);
     CommandDelete(undef,$hcName);
     CommandDefine(undef,"$hcName WeekdayTimer $definition");
-    CommandAttr(undef, "$hcName WDT_delayedExecutionDevices $windows");
+    CommandAttr(undef, "$hcName WDT_delayedExecutionDevices $windows") if defined $windows;
     CommandAttr(undef, "$hcName WDT_Group former_HC");
     foreach my $linesa  ( @a ){
        AnalyzeCommand(undef, "$linesa") unless ($linesa =~ m/^attr $hcName windowSensor/);