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Unhandled Error with Power Automate Desktop

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Posted on by Community Power Pla... Microsoft Employee

I did some test when Power Automate Desktop was installed and it went well.

But I opened it in another day, anywhere I clicked in the App it pop out the error message box as below:

"Message = Arithmetic operation resulted in an overflow.
Error = System.OverflowException
Full text = System.OverflowException: Arithmetic operation resulted in an overflow.
at System.Windows.Shell.WindowChromeWorker._HandleNCHitTest(WM uMsg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at System.Windows.Shell.WindowChromeWorker._WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at System.Windows.Interop.HwndSource.PublicHooksFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
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)
"

Correlation Id: 6deb27f4-e261-4356-a137-3d621c51e617

I have tried uninstall and reinstall, and my keyboard is set as English United States which is align with my environment. It could work well sometimes, but finally still met this error.

Does anyone know how to fix this?

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Power Automate Desktop

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Riyaz_riz11 4,214 Super User 2026 Season 2 on at

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Hi @Anonymous

This issue some r facing becz of network issue
if ur internet not connected while switching on ur pc it may issue or else u can remove ur account from pad relogin

goto run - appdata - Microsoft- pad- delete msalcache.bin3 dlt this file
close ur pad before deleting

while reopen u wil get option to sign in then it will work properly

Thanks
Ahammad Riyaz

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Community Power Pla... Microsoft Employee on at

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Thanks, Ahammad.
I tried to stop another app that may cause some conflicts with PAD and it worked.

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MoonForYoung 6 on at

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can you further explain what app caused the conflict?
the same problem occurred to me when I want to operate on Power Automate Desktop. and I deleted the encryption file---msalcache.bin3, and reload Power Automate Desktop with my account, nothing helped.
so it will be grateful if you can share more infomation about how to resolve this problem.

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Community Power Pla... Microsoft Employee on at

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Hi MoonForYoung,

The App I stopped is called YouDao Dict. It's a dictionary which can capture screen words. So I guess this might have some conflicts with PAD's screen recorder.
Hope this helps.

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Community Power Pla... Microsoft Employee on at

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I have this issue with my account also. Its desktop computer. My Power Automate is not go past the point of Naming your Work Flow. Than that error pops up which says come back later. I've Run the App's Repair, which did nothing to fix the error next it said to use the Delete feature Under the Repair button i did so and still Error. I would try uninstall/Reinstall but the Uninstall button in shadowed and not allowing to interact. Assistance in resolving this issue would be Great.

Cheers

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PK06 2 on at

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Hello,

If you are using a extended monitor(Screen) then try to put Chrome on the main Screen (Check display setting) and then try to use the respective activity. It worked for me.

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