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System Error: When uploading more than 2 knowledge bases directly to CoPilot studio

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Posted on by PC-08101546-0

When adding/uploading more than 2 knowledge base sources directly in CoPilot Studio a System Error is generated by the Bot.

Sorry, something went wrong. Error code: SystemError. Conversation ID: ced5f0a6-353f-43d3-af63-667e426c7b8d. Time (UTC): 10/17/2024 9:35:01 AM.

For example:

I have made a pointer to a specific SharePoint site.

I have added our corporate website.

All works as expected but if I upload a third resource, a spreadsheet, the bot replies with System Error.

If I remove the corporate website and then upload the same spreadsheet, things work as expected.

No matter what uploaded/added resources I use as soon as I add a third resource the bot response with System Error.

As long as I have no more than 2 knowledge sources it will work The error doesn't appear. It appears when I add a third knowledge source.

This happens inside the copilot studio test environment, in the demo website environment and within a Teams channel.
It's not a specific knowledge source because I have tried different combinations. It's definitely the number of resources not the source of the resource that is a problem.

I have seen numerous posts about System Error where the cause hasn't been identified, however with my scenario it's constantly repeatable. A third resource will break the CoPilot bot.

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trice602 15,331 Super User 2025 Season 2 on at

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Hi,

Note sure what the issue may be; other than temporary. Confirm you have the correct permissions for the given folders/files. I was unable to duplicate.

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PC-08101546-0 29 on at

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Hi Tom

I can add resources no problem, but when I go to use the BOT I get the System Error.

The error doesn't happen when adding the resource, it happens when I use a bot that references 3 or more resources.

If I have 2 resources (any resources) it works. If I have more than 2 resources the bot will error.

It's been like that a while now so I don't think it's a temporary blip.

Likewise, its definitely not a folder permission because if I remove a previous resource, the 'new' resource will then start working as expected.

Now that you have 3 resources in your knowledge base, does your BOT continue to work after publishing it?

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SH-17101821-0 2 on at

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Have the same issue, but wasn't aware of the apparent cause being more than 2 knowledge items. I have several dozen knowledge items, mainly PDFs. The copilot worked in Copilot Studio in testing for about 30 minutes then started throwing a "Sorry, something went wrong. Error code: SystemError. Conversation ID....." error, and since then, throws this error every single time. Frustrating.

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PC-08101546-0 29 on at

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SH-17101821-0 Does the error go away if you reduce your knowledge resources to 2 items?

Would be great to confirm that it's definitely an issue with the number of resources rather than some weird error that just seems to effect my tenant.

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Vinoth Selvam 1,590 Super User 2025 Season 2 on at

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Hi PC-08101546-0 ,

Generally this should be possible.

Might be the error is temporary.

You can raise a ticket with Microsoft if you still face the issue. Might be related to Environment.

Thanks.

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PC-08101546-0 29 on at

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According to online resources this should indeed be possible, with up to 500 resources

Upload files as a knowledge source - Microsoft Copilot Studio | Microsoft Learn

However whenever I add a third, the bot will reply with a System Error. This happens regardless as to what that knowledge source is, and regardless to the interface such as copilot studio test, web demo test, or teams.

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