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Paul Woolcock edited this page Dec 24, 2023 · 14 revisions
FAQs > Known Issues

Why Won't OGCS Upgrade? I Know There's a Later Version Released!

If the later version has only just been released, it is usually rolled out gradually over the course of a week. If you wish to upgrade more quickly, the setup file can be downloaded manually - see the wiki Upgrading section for more details.

If you are running a version of OGCS prior to v2.7.4.0, unfortunately GitHub made a change that broke the upgrade mechanism. You will need to manually download at least v2.7.4 for the upgrade process to work again.

ZIP Version Won't Detect Recent Release

GitHub made a further breaking change (this doesn't affect the installed version of OGCS), that means a manual upgrade to at least v2.10.2 will be required for the release detection to work again.

"Page cannot be displayed" After Authorising OGCS To Access My Calendar

ℹ️ Also reported as directing to https://accounts.google.com/info/unknownerror and displaying "An error has occurred! Sorry, an error occurred. Please try again.".

This may happen if you have Google Chrome as your default browser and have previously accessed a website on https://localhost - something web developers or people in IT may do. To resolve this, there are several options available:

  • Change the start of the URL from https:// to http://
  • Perform a hard refresh by pressing
    • Ctrl+F5, or
    • F12 and then right-click the refresh button and Hard Reload or Empty Cache and Hard Reload
  • At the start of the authorisation process, copy the URL out to
    • an Incognito Chrome window (Ctrl+Shift+N)
    • a different browser

Usage Limits Exceeded

Although Google do impose usage limits, there appears to be a bug related to events with multiple recipients with different email address domains. Therefore, if you are continually hitting this problem, try unchecking the sync attendees option.

Unable to add new entries into the Google Calendar. The following error occurred:
Google.Apis.Requests.RequestError
Calendar usage limits exceeded. [403](403)
Errors [
Message[Calendar usage limits exceeded.](Calendar-usage-limits-exceeded.) Location[ - ](---)  
Reason[quotaExceeded](quotaExceeded) Domain[usageLimits](usageLimits)

Anti-Virus False Positives

🌟 As of v2.7.3 OGCS executable files are now code-signed which, over time,
will help anti-virus software to trust it[1] 🌟

[1]However, a new certificate has to be purchased every year, which loses any reputation the previous certificate had built. This means there is a month or so each year of increased false positives whilst the reputation rebuilds on the new certificate. 😞

Some AV software may falsely report OGCS as a virus. This is likely due to OGCS accessing the Outlook address book to determine the email address of meeting attendees, which is required in order to sync them.

This being a spare-time project, there's no way I can submit every release of OGCS to every over-zealous AV vendor - support from the user community in doing so would be greatly appreciated 👍

False positive reporting links for some well known AV vendors:-

Cyclic Redundancy Checks - AKA "CRCs"

These are numbers unique to a file and can help prove that a file has not been tampered with since originally published. To confirm what has been downloaded has the same number:-

  • Locate the file, eg OGCS_Setup.exe in Windows Explorer
  • Right click the file and select CRC SHA > CRC-32
  • To check an executable within a ZIP file
    • Open the ZIP file in Windows Explorer (don't extract it)
    • Right click the file and select Properties to view the CRC-32

Windows Defender SmartScreen Protected Your PC

This is normally the Windows 10 Edge browser marking files that are downloaded from the internet (especially executable files) as blocked by default. To unblock your OGCS download:

  1. For Setup.exe right-click the file and select Properties
  2. In the bottom right hand corner, click the Unblock button.
  3. Execute Setup.exe

If you are wanting to use the portable zip release, either double-click the Windows Defender SmartScreen Unblock.ps1 file or follow these steps manually:

  1. Winkey+R and type powershell
  2. Change directory to the extracted files cd C:\my\extracted\files\directory
  3. Get-ChildItem | Unblock-File
  4. Now run OGCS by double clicking the executable.

Old Events Not Observing Daylight Saving

As per issue 239, 1728, Outlook may not recalculate the new time properly. In this case, you need to re-open the problematic appointment(s), change the start time, change it back and then save it. This should force Microsoft to recalculate the time, accounting for DST, local to you.

Outlook Spam/Junk Mail Interference

As per Issue 1072, holding a programmatic connection open with Outlook appears to interfere with its spam mechanism and the notification messages that display above suspect messages. To workaround this, a hidden option is available with OGCS, forcing it to disconnect from Outlook inbetween syncs:

  1. Go to the About tab and double click on the path for "Config In" - this will open Windows Explorer
  2. Close OGCS
  3. In the Explorer window, find your settings.xml file and open in an editor
  4. Find the DisconnectOutlookBetweenSync line and change the value from false to true
  5. Save and start OGCS

💾 Installation

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ℹ️ FAQs & Known Issues

📄 Limitations

💡 Hints & Tips

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