#1915 CalDav syn error Response status code: '400' ('Bad Request')

[Herbert Voskuil]

Everytime I run the CalDav sync I get this error on just one agenda entry.
"CalDavSynchronizer.DataAccess.WebDavClientException: Response status code does not indicate success: '400' ('Bad Request')".
See attachment for the debug log.
CalDav 4.4.1.0
Windows 11 Pro - 10.0.22621 Build 22621
Microsoft® Outlook® for Microsoft 365 MSO (Version 2208 Build 16.0.15601.20644) 64-bit

Any suggestions?

best regards, Herbert

[Uwe Fricke]

[Alex Thomas]

I've been having exactly the same issue multiple times a day now.

---

~~~

<exceptionthatleadtoabortion>CalDavSynchronizer.DataAccess.WebDavClientException: Response status code does not indicate success: '400' ('Bad Request'). Message:
<?xml version="1.0" encoding="UTF-8"?>
<D:error xmlns:D="DAV:"/></exceptionthatleadtoabortion>

at CalDavSynchronizer.DataAccess.HttpClientBasedClient.WebDavClient.<EnsureSuccessStatusCode>d__10.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at CalDavSynchronizer.DataAccess.HttpClientBasedClient.WebDavClient.<ExecuteWebDavRequest>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at CalDavSynchronizer.DataAccess.HttpClientBasedClient.WebDavClient.<ExecuteWebDavRequestAndReturnResponseHeaders>d__8.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at CalDavSynchronizer.DataAccess.CalDavDataAccess.<TryUpdateEntity>d__28.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at CalDavSynchronizer.Implementation.CalDavRepository1.<TryUpdate>d__16.MoveNext() --- End of stack trace from previous location where exception was thrown --- at CalDavSynchronizer.Implementation.CalDavRepository1.<TryUpdate>d__16.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at GenSync.EntityRepositories.BatchEntityRepositoryAdapter`4.<PerformOperations>d__3.MoveNext()
<operation>UpdateInB</operation>


<considerexceptionthatleadtoabortionaswarning>false</considerexceptionthatleadtoabortionaswarning>
<duration>00:00:02.3807113</duration>

~~~

[Roger]

I also encounter the exact same error. Anyone that can help?

[Herbert Voskuil]

I still have this error on every sync run. Anyone who can help?
Attached today's log and report files.

[rhauff]

I'm also getting the error on every sync, for about the last week or two