# System Logs for Flow Failures? **URL:** \ **Category:** Questions & Help\ **Created:** [December 9, 2024, 11:59pm UTC](https://community.homey.app/t/system-logs-for-flow-failures/123438 "2024-12-09T23:59:31Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![zagman76](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/zagman76/32/119522_2.png) [@zagman76](https://community.homey.app/u/zagman76)\ **Post date:** [December 9, 2024, 11:59pm UTC](https://community.homey.app/t/system-logs-for-flow-failures/123438/1 "2024-12-09T23:59:31Z")
I have several advanced flows that all start with “When sunset is in 45 minutes.” For the last few days, only some of these flows are working. There doesn’t seem to be any pattern either: Today, one of the flows that turns on lights didn’t work, but it worked just fine yesterday and the day before. Also today, another flow turned on the lights, but it did not do so yesterday. Is there any way to diagnose _why_ any particular flow isn’t working when it shares the same ‘When’ card with another flow that **is** working? Thanks! ---
**Author:** ![robertklep](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/robertklep/32/160628_2.png) [@robertklep](https://community.homey.app/u/robertklep)\ **Post date:** [December 10, 2024, 5:15am UTC](https://community.homey.app/t/system-logs-for-flow-failures/123438/2 "2024-12-10T05:15:32Z")
> [@zagman76](#): > > There doesn’t seem to be any pattern either: Random things not working with flows are typically caused by sending commands (like “turn on light”) in parallel (“at the same time”), which is something that Homey cannot handle. It doesn’t generate any errors, it just drops random commands. The typical solution is to introduce delays in between the commands. ---
**Author:** ![Rmb](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rmb/32/79135_2.png) [@Rmb](https://community.homey.app/u/Rmb)\ **Post date:** [December 10, 2024, 8:42am UTC](https://community.homey.app/t/system-logs-for-flow-failures/123438/3 "2024-12-10T08:42:20Z")
Add a notification card directly after the WHEN card to see if the flow actually starts. Then add notification cards directly before the command that switches on a light to see the flow reaches that point. ---
**Author:** ![zagman76](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/zagman76/32/119522_2.png) [@zagman76](https://community.homey.app/u/zagman76)\ **Post date:** [December 10, 2024, 1:42pm UTC](https://community.homey.app/t/system-logs-for-flow-failures/123438/4 "2024-12-10T13:42:04Z")
I appreciate the feedback, but if sending multiple commands at the same time is something Homey cannot handle - that’s unacceptable for both the cost of the product and the modern computing era. If that is true, the underlying system that handles scheduled commands should queue up any command with the same start time and fire them off in sequence. A few microseconds of delay wouldn’t be perceivable. ---
**Author:** ![robertklep](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/robertklep/32/160628_2.png) [@robertklep](https://community.homey.app/u/robertklep)\ **Post date:** [December 10, 2024, 1:45pm UTC](https://community.homey.app/t/system-logs-for-flow-failures/123438/5 "2024-12-10T13:45:21Z")
> [@zagman76](#): > > but if sending multiple commands at the same time is something Homey cannot handle - that’s unacceptable for both the cost of the product and the modern computing era. And still, it’s an issue that Homey has had for many years 🤷🏼‍♂️ ---
**Author:** ![coolweb](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/coolweb/32/88155_2.png) [@coolweb](https://community.homey.app/u/coolweb)\ **Post date:** [February 25, 2026, 6:47am UTC](https://community.homey.app/t/system-logs-for-flow-failures/123438/6 "2026-02-25T06:47:11Z")
I suddenly have also one of my flow that run perfectly manually but not automatically. Could you explain more what is the issue? I have flows with when and hour or sun condition. Homey cannot handle executing multiple flow doing actions at the same time? ---
**Author:** ![robertklep](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/robertklep/32/160628_2.png) [@robertklep](https://community.homey.app/u/robertklep)\ **Post date:** [February 25, 2026, 7:29am UTC](https://community.homey.app/t/system-logs-for-flow-failures/123438/7 "2026-02-25T07:29:30Z")
> [@coolweb](#): > > Homey cannot handle executing multiple flow doing actions at the same time? No, Homey cannot handle multiple action at the same time properly. Missing triggers is a different issue (although Homey missing time-related triggers is _another_ issue that’s well-known). ---
**Author:** ![Peter\_Kawa](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/peter_kawa/32/173848_2.png) [@Peter\_Kawa](https://community.homey.app/u/Peter_Kawa)\ **Post date:** [February 25, 2026, 11:00pm UTC](https://community.homey.app/t/system-logs-for-flow-failures/123438/8 "2026-02-25T23:00:04Z")
> [@coolweb](#): > > flows with when and hour or sun condition. How should I read this, Christophe? Like this? When.. an event x happened And.. it’s between 7 and 10AM or it’s after sunrise Then.. turn off light Y Or like this , with an advanced flow? `When..... | When ....` `it's 7AM | the sun rose` ` \ / ` ` \ / ` ` \ / ` ` Then.. ` ` turn off light Y` ---
**Author:** ![coolweb](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/coolweb/32/88155_2.png) [@coolweb](https://community.homey.app/u/coolweb)\ **Post date:** [February 26, 2026, 6:28am UTC](https://community.homey.app/t/system-logs-for-flow-failures/123438/9 "2026-02-26T06:28:34Z")
Yes like the last case. I have multiple advanced flows. One trigger based on an alarm and other based on the sunrise. And for the moment the sunrise occurs with my alarm. ---
**Author:** ![coolweb](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/coolweb/32/88155_2.png) [@coolweb](https://community.homey.app/u/coolweb)\ **Post date:** [February 27, 2026, 2:48pm UTC](https://community.homey.app/t/system-logs-for-flow-failures/123438/10 "2026-02-27T14:48:05Z")
One more question, multiple action concern only action that perform wifi, zwave, bluetooth, … action or all actions? ---
**Author:** ![robertklep](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/robertklep/32/160628_2.png) [@robertklep](https://community.homey.app/u/robertklep)\ **Post date:** [February 27, 2026, 2:48pm UTC](https://community.homey.app/t/system-logs-for-flow-failures/123438/11 "2026-02-27T14:48:42Z")
Anything that touches a radio as some point. ---
**Author:** ![coolweb](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/coolweb/32/88155_2.png) [@coolweb](https://community.homey.app/u/coolweb)\ **Post date:** [February 27, 2026, 2:48pm UTC](https://community.homey.app/t/system-logs-for-flow-failures/123438/12 "2026-02-27T14:48:59Z")
ok good to know, thx.