System.Exception: HWInfo sensors failed

[FlemmingJPetersen]

Sometime FanControl stops reading sensor info, and here is what is in the log:

2023-06-22 15.21.12: HWInfo sensor failed momentarily during operation: HWInfo/ASUS TUF GAMING Z690-PLUS D4 (Nuvoton NCT6798D)/CPU/RPM - Missing
2023-06-22 15.21.12: Unhandled exception in FanControl v160.0.0.0
2023-06-22 15.21.12: System.Exception: HWInfo sensors failed: HWInfo/ASUS TUF GAMING Z690-PLUS D4 (Nuvoton NCT6798D)/CPU/RPM
at FanControl.HWInfo.HWInfoPlugin.Update() in C:\projects\fancontrol-hwinfo\HWInfoPlugin.cs:line 93
at FanControl.Domain.BackendProviders.Plugin.PluginBackendProvider.Update()
at System.Collections.Generic.List1.ForEach(Action1 action)
at FanControl.Domain.ComputerAccessLayer.Update()
at FanControl.Domain.ApplicationClock.DoActions()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

Somethimes the error is slightly different, but the result is the same:

2023-06-19 07.47.09: Unhandled exception in FanControl v160.0.0.0
2023-06-19 07.47.09: System.Exception: HWInfo was closed during operation.
at FanControl.HWInfo.HWInfoPlugin.Update() in C:\projects\fancontrol-hwinfo\HWInfoPlugin.cs:line 78
at FanControl.Domain.BackendProviders.Plugin.PluginBackendProvider.Update()
at System.Collections.Generic.List1.ForEach(Action1 action)
at FanControl.Domain.ComputerAccessLayer.Update()
at FanControl.Domain.ApplicationClock.DoActions()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

[mminehanNZ]

I'm seeing the same error:

9/07/2023 8:43:25 am: HWInfo sensor failed momentarily during operation: HWInfo/ASUS EC: ASUS /CPU Core Current/A - Missing
29/07/2023 8:43:25 am: Unhandled exception in FanControl v164.0.0.0
29/07/2023 8:43:25 am: System.Exception: HWInfo sensors failed: HWInfo/ASUS EC: ASUS /CPU Core Current/A
at FanControl.HWInfo.HWInfoPlugin.Update()
at FanControl.Domain.BackendProviders.Plugin.PluginBackendProvider.Update()
at System.Collections.Generic.List1.ForEach(Action1 action)
at FanControl.Domain.ComputerAccessLayer.Update()
at FanControl.Domain.ApplicationClock.DoActions()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
29/07/2023 11:30:03 am: HWInfo sensor failed momentarily during operation: HWInfo/ASUS EC: ASUS /CPU Core Current/A - Missing
29/07/2023 11:30:03 am: Unhandled exception in FanControl v164.0.0.0
29/07/2023 11:30:03 am: System.Exception: HWInfo sensors failed: HWInfo/ASUS EC: ASUS /CPU Core Current/A
at FanControl.HWInfo.HWInfoPlugin.Update()
at FanControl.Domain.BackendProviders.Plugin.PluginBackendProvider.Update()
at System.Collections.Generic.List1.ForEach(Action1 action)
at FanControl.Domain.ComputerAccessLayer.Update()
at FanControl.Domain.ApplicationClock.DoActions()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

HWInfo Version 7.60-5170

[mminehanNZ]

Any update or progress on this issue?
I'm getting this error almost hourly.

[mminehanNZ]

So I have kind of fixed the problem by disabling the CPU current draw measurement in the HWInfo app itself:
29/07/2023 11:30:03 am: HWInfo sensor failed momentarily during operation: HWInfo/ASUS EC: ASUS /CPU Core Current/A - Missing

Seems the fan control plugin has issues if one of the HWInfo sensors goes missing.

[gund]

This is also happening on my machine, I'm monitoring HWInfo sensors of coolant, ram and drives temperatures but they periodically fail and read zeros.
The missing sensor seems to be one of the RAM sticks temperature HWInfo/DDR5 DIMM [#1] (BANK 0/Controller0-DIMM1)/SPD Hub Temperature/°C and not the CPU current draw as in other case so this seems to be a random failure.

Also since the HWInfo itself has no issues with this sensor and always reads the values without dropping to zeros maybe Fancontrol plugin can gracefully handle this error instead of a hard failure and retry the sensor in a few milliseconds?
This retry timeout could even be configurable in the UI if it's also non deterministic and different machines would need different timeouts.

It would also be nice if such a failure could trigger system level notification or even better have a "failover" curve that can be triggered if some sensor readings are zero so that my machine does not silently heats up and I have to manually come in and restart Fancontrol app. Currently it is very unreliable tbh.

Here are the logs:

10/07/2024 01:28:58: HWInfo sensor failed momentarily during operation: HWInfo/DDR5 DIMM [#1] (BANK 0/Controller0-DIMM1)/SPD Hub Temperature/°C - Missing
HWInfo/DDR5 DIMM [#3] (BANK 0/Controller1-DIMM1)/SPD Hub Temperature/°C - Missing
10/07/2024 01:28:58: Unhandled exception in FanControl v194.0.0.0
10/07/2024 01:28:58: LogUnhandledException - System.Exception: HWInfo sensors failed: HWInfo/DDR5 DIMM [#1] (BANK 0/Controller0-DIMM1)/SPD Hub Temperature/°C
   at FanControl.HWInfo.HWInfoPlugin.Update() in C:\projects\fancontrol-hwinfo\HWInfoPlugin.cs:line 93
   at FanControl.Domain.BackendProviders.Plugin.PluginBackendProvider.Update()
   at System.Collections.Generic.List`1.ForEach(Action`1 action)
   at FanControl.Domain.ComputerAccessLayer.Update()
   at FanControl.Domain.ApplicationClock.DoActions()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
10/07/2024 02:18:02: HWInfo sensor failed momentarily during operation: HWInfo/DDR5 DIMM [#1] (BANK 0/Controller0-DIMM1)/SPD Hub Temperature/°C - Missing
10/07/2024 02:18:02: Unhandled exception in FanControl v194.0.0.0
10/07/2024 02:18:02: LogUnhandledException - System.Exception: HWInfo sensors failed: HWInfo/DDR5 DIMM [#1] (BANK 0/Controller0-DIMM1)/SPD Hub Temperature/°C
   at FanControl.HWInfo.HWInfoPlugin.Update() in C:\projects\fancontrol-hwinfo\HWInfoPlugin.cs:line 93
   at FanControl.Domain.BackendProviders.Plugin.PluginBackendProvider.Update()
   at System.Collections.Generic.List`1.ForEach(Action`1 action)
   at FanControl.Domain.ComputerAccessLayer.Update()
   at FanControl.Domain.ApplicationClock.DoActions()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
10/07/2024 02:45:24: HWInfo sensor failed momentarily during operation: HWInfo/DDR5 DIMM [#1] (BANK 0/Controller0-DIMM1)/SPD Hub Temperature/°C - Missing
HWInfo/DDR5 DIMM [#3] (BANK 0/Controller1-DIMM1)/SPD Hub Temperature/°C - Missing
10/07/2024 02:45:24: Unhandled exception in FanControl v194.0.0.0
10/07/2024 02:45:24: LogUnhandledException - System.Exception: HWInfo sensors failed: HWInfo/DDR5 DIMM [#3] (BANK 0/Controller1-DIMM1)/SPD Hub Temperature/°C, HWInfo/DDR5 DIMM [#1] (BANK 0/Controller0-DIMM1)/SPD Hub Temperature/°C
   at FanControl.HWInfo.HWInfoPlugin.Update() in C:\projects\fancontrol-hwinfo\HWInfoPlugin.cs:line 93
   at FanControl.Domain.BackendProviders.Plugin.PluginBackendProvider.Update()
   at System.Collections.Generic.List`1.ForEach(Action`1 action)
   at FanControl.Domain.ComputerAccessLayer.Update()
   at FanControl.Domain.ApplicationClock.DoActions()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
10/07/2024 15:32:02: HWInfo sensor failed momentarily during operation: HWInfo/DDR5 DIMM [#1] (BANK 0/Controller0-DIMM1)/SPD Hub Temperature/°C - Missing
HWInfo/DDR5 DIMM [#3] (BANK 0/Controller1-DIMM1)/SPD Hub Temperature/°C - Missing
10/07/2024 15:32:02: Unhandled exception in FanControl v194.0.0.0
10/07/2024 15:32:02: LogUnhandledException - System.Exception: HWInfo sensors failed: HWInfo/DDR5 DIMM [#1] (BANK 0/Controller0-DIMM1)/SPD Hub Temperature/°C, HWInfo/DDR5 DIMM [#3] (BANK 0/Controller1-DIMM1)/SPD Hub Temperature/°C
   at FanControl.HWInfo.HWInfoPlugin.Update() in C:\projects\fancontrol-hwinfo\HWInfoPlugin.cs:line 93
   at FanControl.Domain.BackendProviders.Plugin.PluginBackendProvider.Update()
   at System.Collections.Generic.List`1.ForEach(Action`1 action)
   at FanControl.Domain.ComputerAccessLayer.Update()
   at FanControl.Domain.ApplicationClock.DoActions()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
10/07/2024 17:43:11: HWInfo sensor failed momentarily during operation: HWInfo/DDR5 DIMM [#1] (BANK 0/Controller0-DIMM1)/SPD Hub Temperature/°C - Missing
10/07/2024 17:43:11: Unhandled exception in FanControl v194.0.0.0
10/07/2024 17:43:11: LogUnhandledException - System.Exception: HWInfo sensors failed: HWInfo/DDR5 DIMM [#1] (BANK 0/Controller0-DIMM1)/SPD Hub Temperature/°C
   at FanControl.HWInfo.HWInfoPlugin.Update() in C:\projects\fancontrol-hwinfo\HWInfoPlugin.cs:line 93
   at FanControl.Domain.BackendProviders.Plugin.PluginBackendProvider.Update()
   at System.Collections.Generic.List`1.ForEach(Action`1 action)
   at FanControl.Domain.ComputerAccessLayer.Update()
   at FanControl.Domain.ApplicationClock.DoActions()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)