System.Runtime.InteropServices.COMException (0xBA57000E): Out of memory or system resources. Close some windows or programs and try again.

[EclecticREiN]

System.Runtime.InteropServices.COMException (0xFA57000E): Out of memory or system resources. Close some windows or programs and try again. (Multiple occurrences {over 20})

at Microsoft.Office.Interop.Outlook._AppointmentItem.get_Start()
at CalDavSynchronizer.Implementation.Events.DuplicateEventCleaner.GetDuplicationRelevantData(AppointmentItem item)
at CalDavSynchronizer.Implementation.Events.DuplicateEventCleaner.<>c.b__9_1(Tuple2 appointmentWithId) at System.Linq.Enumerable.WhereSelectArrayIterator2.MoveNext()
at System.Linq.Lookup2.Create[TSource](IEnumerable1 source, Func2 keySelector, Func2 elementSelector, IEqualityComparer1 comparer) at System.Linq.GroupedEnumerable3.GetEnumerator()
at System.Linq.Enumerable.WhereSelectEnumerableIterator2.MoveNext() at System.Linq.Enumerable.<SelectManyIterator>d__233.MoveNext()
at System.Linq.Buffer1..ctor(IEnumerable1 source)
at System.Linq.Enumerable.ToArray[TSource](IEnumerable1 source) at CalDavSynchronizer.Implementation.Events.DuplicateEventCleaner.<DeleteAnnouncedEventsIfDuplicates>d__9.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at CalDavSynchronizer.Implementation.Events.OutlookEventRepository.<VerifyUnknownEntities>d__20.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at GenSync.Synchronization.Synchronizer11.d__32.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at GenSync.Synchronization.Synchronizer11.<Synchronize>d__31.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at GenSync.Synchronization.Synchronizer11.d__27.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at GenSync.Synchronization.ContextCreatingSynchronizerDecorator`7.d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at CalDavSynchronizer.Scheduling.SynchronizationProfileRunner.d__22.MoveNext()

This occurs with all of my synced accounts with the Exception number being the only thing that changes; this did not happen before and started about 2-3 weeks ago. The system at this time is only using 44% memory resources. System has been rebooted several times, I have unticked the "Use fast queries for Outlook folders". Dav links were updated automatically via CalDav Synchronizer. The system still seems to sync items which is strange in essence. I also received multiple errors as noted:

• System.Runtime.InteropServices.COMException (0x80020009): Cannot save this item. (Multiple occurrences {over 20})

  at Microsoft.Office.Interop.Outlook._AppointmentItem.Save()
  at CalDavSynchronizer.Implementation.ComWrappers.AppointmentItemWrapper.SaveAndReload()
  at CalDavSynchronizer.Implementation.Events.EventEntityMapper.MapRecurrance2To1(IEvent source, IReadOnlyCollection1 exceptions, IAppointmentItemWrapper targetWrapper, IEntitySynchronizationLogger logger, IEventSynchronizationContext context) at CalDavSynchronizer.Implementation.Events.EventEntityMapper.Map2To1(IEvent source, IReadOnlyCollection1 recurrenceExceptionsOrNull, IAppointmentItemWrapper targetWrapper, Boolean isRecurrenceException, IEntitySynchronizationLogger logger, IEventSynchronizationContext context)
  at CalDavSynchronizer.Implementation.Events.EventEntityMapper.Map2To1(IICalendar sourceCalendar, IAppointmentItemWrapper target, IEntitySynchronizationLogger logger, IEventSynchronizationContext context)
  at GenSync.Synchronization.States.CreateInA7.<InitializeEntity>d__13.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at GenSync.Synchronization.States.CreateInA7.JobWrapper.d__5.MoveNext()
  --- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
  at CalDavSynchronizer.Implementation.Events.OutlookEventRepository.d__25.MoveNext()
  --- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
  at GenSync.EntityRepositories.BatchEntityRepositoryAdapter`4.d__3.MoveNext()

• System.Runtime.InteropServices.COMException (0xDEE20009): The object does not support this method. (1 occurrence gmail account)

  at Microsoft.Office.Interop.Outlook._AppointmentItem.get_Start()
  at CalDavSynchronizer.Implementation.Events.DuplicateEventCleaner.GetDuplicationRelevantData(AppointmentItem item)
  at CalDavSynchronizer.Implementation.Events.DuplicateEventCleaner.<>c.b__9_1(Tuple2 appointmentWithId) at System.Linq.Enumerable.WhereSelectArrayIterator2.MoveNext()
  at System.Linq.Lookup2.Create[TSource](IEnumerable1 source, Func2 keySelector, Func2 elementSelector, IEqualityComparer1 comparer) at System.Linq.GroupedEnumerable3.GetEnumerator()
  at System.Linq.Enumerable.WhereSelectEnumerableIterator2.MoveNext() at System.Linq.Enumerable.<SelectManyIterator>d__233.MoveNext()
  at System.Linq.Buffer1..ctor(IEnumerable1 source)
  at System.Linq.Enumerable.ToArray[TSource](IEnumerable1 source) at CalDavSynchronizer.Implementation.Events.DuplicateEventCleaner.<DeleteAnnouncedEventsIfDuplicates>d__9.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at CalDavSynchronizer.Implementation.Events.OutlookEventRepository.<VerifyUnknownEntities>d__20.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at GenSync.Synchronization.Synchronizer11.d__32.MoveNext()
  --- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
  at GenSync.Synchronization.Synchronizer11.<Synchronize>d__31.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at GenSync.Synchronization.Synchronizer11.d__27.MoveNext()
  --- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
  at GenSync.Synchronization.ContextCreatingSynchronizerDecorator`7.d__3.MoveNext()
  --- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
  at CalDavSynchronizer.Scheduling.SynchronizationProfileRunner.d__22.MoveNext()

---

Please note when responding with instruction, be detailed as I am not a developer nor am I familiar enough with CalDav Synchronizer despite having used it for many years.

Here is another for same sync multiple issues:  #309

---