SIZE-001:Invoice file too large to process
Your invoice file exceeds the 10MB size limit and cannot be validated or processed. This usually happens when large attachments (PDFs, images) are embedded directly in the XML file.
Engine Classification
Financial or legal field · Modification blocked by policy
Reason: Your invoice file exceeds the 10MB processing limit. This is usually caused by large embedded attachments (PDF copies, images, or other documents) inside the XML. Remove these attachments and send them separately, or reduce their size. Most invoices without embedded files are well under 1MB.
What is SIZE-001?
SIZE-001 is a fatal validation rule in e-invoice validation. It checks whether invoice file too large to process.
When this rule fires, the invoice is non-compliant and will be rejected by Peppol access points and national validation services. The sending system receives a rejection response and the invoice does not reach the buyer.
Why This Error Matters
SIZE-001 is a hard failure. Invoices that trigger this rule are rejected at the access point and never reach the recipient. In Peppol networks, this means your sending system receives an MLR (Message Level Response) with a rejection status. The invoice must be corrected and re-sent, adding delay to your payment cycle.
Validator Behavior
- ·Causes invoice rejection
- ·Error returned: SIZE-001
How to Fix It
Technical Reference
Seeing this in production? The API handles SIZE-001 automatically. See the fix response →
Last updated: 20 February 2026
Handle SIZE-001 Automatically in Your Pipeline
The compliance engine auto-remediates this error with controlled safety policies and evidence pack generation.