Hi everyone,
I’m experiencing an issue with PDF file processing in Microsoft Copilot Studio and I’m wondering if anyone has encountered the same problem.
I created an agent that analyzes PDF documents uploaded directly by the user in the Copilot Studio test chat. There is currently no Power Automate flow, connector, or external tool involved, the PDF is simply uploaded directly to the agent.
The issue is that some PDFs work perfectly, while larger/longer PDFs consistently return:
SystemError
This error does not produce an error message.
For example:
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A PDF with 48 pages works correctly
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A PDF with 79 pages fails with SystemError
-
Both files are below the documented maximum file size
From my testing, the issue seems to be related more to the number of pages or document complexity than to the actual file size.
I have seen documentation mentioning a 50-page limit for document inputs in prompts, but I cannot find clear information confirming whether a similar limitation applies to PDFs uploaded directly in an agent conversation.
Has anyone encountered this limitation with Copilot Studio agents?
Is there currently a page limit for PDFs uploaded directly to an agent, and if so, is there any recommended way to allow an agent to reliably analyze documents containing 50–100+ pages without requiring users to manually split the PDF?
Any insight or workaround would be greatly appreciated. Thanks!
