[GH-ISSUE #375] ERROR: System.Xml.XmlException: '', hexadecimal value 0x1A, is an invalid character #1259

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opened 2026-03-14 00:47:54 +03:00 by kerem · 2 comments

kerem commented

2026-03-14 00:47:54 +03:00

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Originally created by @andrea-dintino on GitHub (Jan 4, 2023).
Original GitHub issue: https://github.com/aluxnimm/outlookcaldavsynchronizer/issues/375

Hi @aluxnimm,

I've been getting this for a while now:

<?xml version="1.0" encoding="utf-16"?>
<SynchronizationReport xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <ProfileName>andrea@dyne.org</ProfileName>
  <ProfileId>0f9f6fc6-5cc1-400f-98e9-d8ab8a34c232</ProfileId>
  <StartTime>2023-01-04T09:28:43.3949323Z</StartTime>
  <ADelta>Unchanged: 0 , Added: 0 , Deleted 0 ,  Changed 0</ADelta>
  <BDelta>Unchanged: 0 , Added: 91 , Deleted 0 ,  Changed 0</BDelta>
  <AJobsInfo>Create 0 , Update 0 , Delete 0</AJobsInfo>
  <BJobsInfo>Create 0 , Update 0 , Delete 0</BJobsInfo>
  <LoadErrors />
  <EntitySynchronizationReports />
  <ExceptionThatLeadToAbortion>System.Xml.XmlException: '&#x1A;', hexadecimal value 0x1A, is an invalid character. Line 4547, position 38.
   at System.Xml.XmlTextReaderImpl.Throw(Exception e)
   at System.Xml.XmlTextReaderImpl.Throw(String res, String[] args)
   at System.Xml.XmlTextReaderImpl.ParseText(Int32&amp; startPos, Int32&amp; endPos, Int32&amp; outOrChars)
   at System.Xml.XmlTextReaderImpl.FinishPartialValue()
   at System.Xml.XmlTextReaderImpl.get_Value()
   at System.Xml.XmlLoader.LoadNode(Boolean skipOverWhitespace)
   at System.Xml.XmlLoader.LoadDocSequence(XmlDocument parentDoc)
   at System.Xml.XmlLoader.Load(XmlDocument doc, XmlReader reader, Boolean preserveWhitespace)
   at System.Xml.XmlDocument.Load(XmlReader reader)
   at CalDavSynchronizer.DataAccess.WebDavClientBase.DeserializeXmlStream(Stream webDavXmlStream)
   at CalDavSynchronizer.DataAccess.HttpClientBasedClient.WebDavClient.&lt;ExecuteWebDavRequestAndReadResponse&gt;d__7.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.&lt;GetEntities&gt;d__30.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.CalDavRepository`1.&lt;Get&gt;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 GenSync.Synchronization.EntityContainer`4.&lt;GetEntities&gt;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 System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
   at GenSync.Synchronization.Synchronizer`11.&lt;Synchronize&gt;d__31.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.Synchronization.Synchronizer`11.&lt;Synchronize&gt;d__27.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 GenSync.Synchronization.ContextCreatingSynchronizerDecorator`7.&lt;Synchronize&gt;d__3.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.Scheduling.SynchronizationProfileRunner.&lt;RunAndRescheduleNoThrow&gt;d__22.MoveNext()</ExceptionThatLeadToAbortion>
  <ConsiderExceptionThatLeadToAbortionAsWarning>false</ConsiderExceptionThatLeadToAbortionAsWarning>
  <Duration>00:00:01.2239073</Duration>
</SynchronizationReport>

My guess is that somewhere in some NextCloud Calendar entry there is an illegal character "&#x1A", but I have no clue how to search for it?

thanks,
Andrea

Originally created by @andrea-dintino on GitHub (Jan 4, 2023). Original GitHub issue: https://github.com/aluxnimm/outlookcaldavsynchronizer/issues/375 Hi @aluxnimm, I've been getting this for a while now: ``` <?xml version="1.0" encoding="utf-16"?> <SynchronizationReport xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <ProfileName>andrea@dyne.org</ProfileName> <ProfileId>0f9f6fc6-5cc1-400f-98e9-d8ab8a34c232</ProfileId> <StartTime>2023-01-04T09:28:43.3949323Z</StartTime> <ADelta>Unchanged: 0 , Added: 0 , Deleted 0 , Changed 0</ADelta> <BDelta>Unchanged: 0 , Added: 91 , Deleted 0 , Changed 0</BDelta> <AJobsInfo>Create 0 , Update 0 , Delete 0</AJobsInfo> <BJobsInfo>Create 0 , Update 0 , Delete 0</BJobsInfo> <LoadErrors /> <EntitySynchronizationReports /> <ExceptionThatLeadToAbortion>System.Xml.XmlException: '', hexadecimal value 0x1A, is an invalid character. Line 4547, position 38. at System.Xml.XmlTextReaderImpl.Throw(Exception e) at System.Xml.XmlTextReaderImpl.Throw(String res, String[] args) at System.Xml.XmlTextReaderImpl.ParseText(Int32& startPos, Int32& endPos, Int32& outOrChars) at System.Xml.XmlTextReaderImpl.FinishPartialValue() at System.Xml.XmlTextReaderImpl.get_Value() at System.Xml.XmlLoader.LoadNode(Boolean skipOverWhitespace) at System.Xml.XmlLoader.LoadDocSequence(XmlDocument parentDoc) at System.Xml.XmlLoader.Load(XmlDocument doc, XmlReader reader, Boolean preserveWhitespace) at System.Xml.XmlDocument.Load(XmlReader reader) at CalDavSynchronizer.DataAccess.WebDavClientBase.DeserializeXmlStream(Stream webDavXmlStream) at CalDavSynchronizer.DataAccess.HttpClientBasedClient.WebDavClient.<ExecuteWebDavRequestAndReadResponse>d__7.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.<GetEntities>d__30.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.CalDavRepository`1.<Get>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 GenSync.Synchronization.EntityContainer`4.<GetEntities>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 System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task) at GenSync.Synchronization.Synchronizer`11.<Synchronize>d__31.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.Synchronization.Synchronizer`11.<Synchronize>d__27.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 GenSync.Synchronization.ContextCreatingSynchronizerDecorator`7.<Synchronize>d__3.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.Scheduling.SynchronizationProfileRunner.<RunAndRescheduleNoThrow>d__22.MoveNext()</ExceptionThatLeadToAbortion> <ConsiderExceptionThatLeadToAbortionAsWarning>false</ConsiderExceptionThatLeadToAbortionAsWarning> <Duration>00:00:01.2239073</Duration> </SynchronizationReport> ``` My guess is that somewhere in some NextCloud Calendar entry there is an illegal character "&#x1A", but I have no clue how to search for it? thanks, Andrea

kerem closed this issue

2026-03-14 00:47:59 +03:00

kerem commented

2026-03-14 00:48:05 +03:00

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@brrrrrrrt commented on GitHub (Jan 12, 2023):

+1 same, but '0x14'

unable to synchronize :(

@brrrrrrrt commented on GitHub (Jan 12, 2023): +1 same, but '0x14' unable to synchronize :(

kerem commented

2026-03-14 00:48:10 +03:00

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Owner

@aluxnimm commented on GitHub (Feb 18, 2023):

You need to export the whole calendar as an ics file from the server, open with notepad++ and find that invalid characters.
We will hopefully fix the issue and filter our invalid xml characters in our next release.

@aluxnimm commented on GitHub (Feb 18, 2023): You need to export the whole calendar as an ics file from the server, open with notepad++ and find that invalid characters. We will hopefully fix the issue and filter our invalid xml characters in our next release.