No synchronization error

That can happen, the synchronization doesn’t work. They want to find the problem. There is a log file for the analysis.

Open the log file after synchronization with the status button. At the end of the synchronization, the status button has one of the two icons:

Sync OK
Sync ok
Sync Error
Sync failed

Click the status button to open the log file. At the end there are the most recent lines. Therefore it makes sense to read the file from the end (below).

Each line begins with the date and time as well as a categorization:

  • [Information] This line only outputs information.
  • [Warning] This line affects the synchronization. The synchronization is completed
  • [Error] This line shows an error. The error affects the synchronization of an entry or the entire synchronization.

This is followed by a note where the error occurred and a description of the same.

In the case of contacts or appointments, a reference to the entry usually follows at the end. It should be noted here that time information is given in UTC time format.

If the synchronization “sticks” to a contact or appointment, you can remove the appointment / contact in Outlook or Google for a test and perform the synchronization again. The synchronization may be in progress.

Sync Errors, Fixes and Workarounds

Data deleted?

24.08.2020 15:26:07;[Error];calendarSyncronize::SyncronizeContactsOutlook2Google();Das
Abrufen von Google-Kontaktdaten ist fehlgeschlagen. Bitte versuchen Sie es erneut oder 
legen Sie einen Kontakt in Google an. Diese Meldungg kommt, wenn Kontakte synchronisiert 
wurden und beim erneuten Abrufen von Google keine Kontakte übergeben wurden. ;;

Root Cause

This error message prevents the deletion of all contact data. The Google service does not return any data. You may have deleted the data yourself. It could also be a problem with the Google service. There is a similar message for appointments.


Solve the problem by creating a contact (or appointment) in Google.

Repetition in series appointment not recognized

25.11.2019 05:42:31;[Error];OutlookCalendar::UpdateCalendarItem2();Error [45];Item: 
Title: 'Krabbelgruppe' AllDay-Event: False Startzeit: 2019-09-12 07:30:00 Endezeit: 
2019-09-12 08:30:00 Count: 0 Intervall: 0 NoEndDate: True Until: 1972-06-08 00:00:00 
RepeatObject:  iEx: ;Das Serienmuster ist ungültig.

Root cause

The series sample was not recognized for the series appointment “crawling group”. It is possible that the appointment cannot be converted to Outlook / Google.


Check the settings of the recurring appointment. You can send me this line and a screenshot for analysis. You can find the contact details below.

Calendar in Outlook not found

05.09.2020 13:12:15;[Error];OutlookCalendar::GetCalendarFolder;Error[10] in getting 
Outlook folder.;Folder: \\;Der Objektverweis wurde nicht auf eine 
Objektinstanz festgelegt.
29.08.2020 19:41:54;[Error];calendarSyncronize::SyncronizeCalendarOutlook2Google();Bad 
configurtion, folder not exist. Error in creating Outlook calendar item.;Folder: 
'\\' not found. Item: Termin Zahnreinigung start(utc): 09.11.2020 

Root Cause

With both errors the calendar \ was not found. May be the calendar was removed or renamed.


Please check the configuration in the wizard and save the configuration at the last page of wizard.

„Microsoft.Office.Core.IRibbonUI“ Bug

Das COM-Objekt des Typs "System.__ComObject" kann nicht in den Schnittstellentyp
"Microsoft.Office.Core.IRibbonUI" umgewandelt werden. Dieser Vorgang konnte nicht
durchgeführt werden, da der QueryInterface-Aufruf an die COM-Komponente für die 
Schnittstelle mit der IID "{000C03A7-0000-0000-C000-000000000046}" aufgrund des folgenden
Fehlers nicht durchgeführt werden konnte: Bibliothek nicht registriert. (Ausnahme von 

Root Cause

Operating system or Microsoft Office compoment is removed / missing.


  • The VSTO Runtime has been uninstalled or partially removed by uninstalling other programs. You can download the VSTO Runtime on the following page: Download Visual Studio 2010 Tools for Office Runtime and install as described on the download page.
  • Outlook version older than 2016 is installed. Then you should update to Outlook version 2016, 2019 or Office 365.


You can send me error lines from the current version using the contact form. I will reply promptly.

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