product · inferred from evidence
error 3740
A specific error code returned by Mistral OCR for invalid PDF files.
- Mistral OCR rejects valid PDFs: `document_parser_invalid_file` (error 3740)
Yes, this was a Mistral-side bug, not your file. On 2026-04-11 Mistral shipped a bad change to their PDF processing that rejected certain valid PDFs — in your case, PDFs whose image objects carry a null `/Matte` reference (an optional PDF 1