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[GH-ISSUE #115] NullReferenceException when syncing with Google Calendar #112

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opened 2026-02-25 20:30:55 +03:00 by kerem · 4 comments

kerem commented

2026-02-25 20:30:55 +03:00

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Originally created by @wrstlbrnft on GitHub (Feb 19, 2016).
Original GitHub issue: https://github.com/aluxnimm/outlookcaldavsynchronizer/issues/115

I'm using v.1.18.0.0 on Outlook 2016. When syncing (two-way) with my Google calendar, I get a NullReferenceException, as shown in the attached screenshot.

Is there a way to figure out what properties of the offending event cause the NRE so I can fix it by updating the event?

Originally created by @wrstlbrnft on GitHub (Feb 19, 2016). Original GitHub issue: https://github.com/aluxnimm/outlookcaldavsynchronizer/issues/115 I'm using v.1.18.0.0 on Outlook 2016. When syncing (two-way) with my Google calendar, I get a NullReferenceException, as shown in the attached screenshot. ![caldav-npe](https://cloud.githubusercontent.com/assets/3921172/13173476/fe6da5f0-d6fd-11e5-92c0-f38ca0133f26.jpg) Is there a way to figure out what properties of the offending event cause the NRE so I can fix it by updating the event?

kerem closed this issue

2026-02-25 20:30:55 +03:00

kerem commented

2026-02-25 20:30:55 +03:00

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@aluxnimm commented on GitHub (Feb 19, 2016):

Please provide the raw data of the offending server event. For that click on the link below "Server ID" to download the ics file. Attach it here that we can identify the problem.

@aluxnimm commented on GitHub (Feb 19, 2016): Please provide the raw data of the offending server event. For that click on the link below "Server ID" to download the ics file. Attach it here that we can identify the problem.

kerem commented

2026-02-25 20:30:56 +03:00

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@wrstlbrnft commented on GitHub (Feb 19, 2016):

Here is the offending event. It was originally created on an Exchange calendar and I then copied it in Outlook to a local calendar which I sync with Google.
offending.ics.txt

@wrstlbrnft commented on GitHub (Feb 19, 2016): Here is the offending event. It was originally created on an Exchange calendar and I then copied it in Outlook to a local calendar which I sync with Google. [offending.ics.txt](https://github.com/aluxnimm/outlookcaldavsynchronizer/files/137808/offending.ics.txt)

kerem commented

2026-02-25 20:30:56 +03:00

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@aluxnimm commented on GitHub (Feb 19, 2016):

Can't find anything offending in that ics file and can sync it from Google to Outlook without error. Since the sync is trying to update an existing Outlook item maybe in the Outlook appointment is some error. Delete the item in Outlook and change sync direction Outlook<-Server (Replicate) once to recreate it in Outlook to check if it can be created.

@aluxnimm commented on GitHub (Feb 19, 2016): Can't find anything offending in that ics file and can sync it from Google to Outlook without error. Since the sync is trying to update an existing Outlook item maybe in the Outlook appointment is some error. Delete the item in Outlook and change sync direction Outlook<-Server (Replicate) once to recreate it in Outlook to check if it can be created.

kerem commented

2026-02-25 20:30:56 +03:00

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@wrstlbrnft commented on GitHub (Feb 19, 2016):

I deleted the event and re-created it. Now it syncs fine.
I'm sorry if that prevented you from finding out more, which the replicate server->Outlook could have revealed.
Thank you very much for your help!

@wrstlbrnft commented on GitHub (Feb 19, 2016): I deleted the event and re-created it. Now it syncs fine. I'm sorry if that prevented you from finding out more, which the replicate server->Outlook could have revealed. Thank you very much for your help!

kerem referenced this issue

2026-02-25 20:31:00 +03:00

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2026-03-01 17:40:02 +03:00

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kerem referenced this issue

2026-03-01 17:40:22 +03:00

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2026-03-13 23:50:36 +03:00

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