Frame.GoBack() occasionally throws "Exception: Unspecified error (Exception from HRESULT: 0x80004005)"

Hong 1,051

if (Frame.CanGoBack)
{
   Frame.GoBack();
}

The above code works fine usually, but Frame.GoBack() occasionally throws the following:

System.Exception: Unspecified error (Exception from HRESULT: 0x80004005)
Stack Trace:
at System.Runtime.InteropServices.McgMarshal.ThrowOnExternalCallFailed(Int32, RuntimeTypeHandle) + 0x21
at __Interop.ComCallHelpers.Call(__ComObject, RuntimeTypeHandle, Int32) + 0xb8
at __Interop.ForwardComStubs.Stub_11TThis + 0x24

Could anyone shed some light on the possible causes?

Nico Zhu (Shanghai Wicresoft Co,.Ltd.) 12,856 Reputation points

2021-05-31T01:19:32.48+00:00
Please set debug point in current page OnNavigatedFrom method, and previous page OnNavigatedTo method to detect if there is exception, or use try-catch block to pack

if (Frame.CanGoBack) { Frame.GoBack(); }

told user exception throwing, and try to go back again.
Hong 1,051 Reputation points

2021-05-31T13:03:16.523+00:00

Thank you for the tip. Actually, the app is already doing repeated tries (3 times in total with an interval of 10 ms). Perhaps the interval should be increased.
Nico Zhu (Shanghai Wicresoft Co,.Ltd.) 12,856 Reputation points

2021-06-01T01:18:50.883+00:00

Yep, your thread is correct, and you could also for-each current navigation stack, and check if item is available.