It's size issue for sure as I will get the error only if size of the file is larger than 512KB or something in onedrive
In Copilot Studio Agent can not retrieve file of size 0.5 MB more
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Byalihala, Chetan
0
Reputation points
In Copilot Studio Agent cannot retrieve file of size 0.5 MB more it will through the error as below
Sorry, something went wrong. Error code: SystemError. Conversation ID: 79e421dd-e59d-4c0b-b885-25dc4d3008d6. Time (UTC): 3/12/2026 6:18:16 PM.
Microsoft Copilot | Other
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Aman, Jude 0 Reputation points2026-03-30T18:48:54.2+00:00 I have been getting the same issue after submitting a file and receiving a response. Hopefully this will be resolved before long.
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2 answers
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Byalihala, Chetan 0 Reputation points
2026-03-12T18:31:50.8766667+00:00 -
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Nivedipa-MSFT 4,251 Reputation points Microsoft External Staff Moderator2026-03-13T05:51:34.58+00:00 Hello Byalihala, Chetan - Copilot Studio has a response payload limit of approximately 0.5 MB. Files exceeding this size will trigger a SystemError.
Solution: Avoid returning the file content directly through the agent. Instead, provide a download URL (such as a SharePoint link or SAS URL) for users to access the file. For log files, you may choose to return only the last N lines (a summary or tail) to keep the response within the size limit.
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AI answer
2026-03-12T18:23:19.92+00:00 The error code
SystemErrorindicates a platform-side issue in Copilot Studio, not a file-size limit problem in the agent configuration.From the documented limits, Copilot Studio can load individual files up to 512 MB as knowledge sources, and SharePoint-based generative answers can handle files significantly larger than 0.5 MB (subject to the 7 MB / 200 MB limits depending on licensing). A 0.5–1 MB file is therefore well within supported size limits.
Because
SystemErrorhas no user-fixable cause, the only supported resolution is to contact Microsoft support with the full error details:- Collect the error information shown in the message:
- Error code:
SystemError. - Conversation ID.
- UTC timestamp.
- The action being performed (for example, retrieving a specific file via the agent).
- Error code:
- Open a support ticket for Copilot Studio and provide these details so the service team can investigate the backend failure.
There is no configuration change in the agent that can resolve
SystemError; it must be handled by Microsoft support.
References:
AI-generated content may be incorrect. Read our transparency notes for more information. - Collect the error information shown in the message: