Why does Invoice Navigator return XML-001 instead of a specific rule code?

Well-formedness failures occur before the XML can be loaded into a DOM, so no schema or Schematron rule can run.

Is XML-001 auto-fixable?

No. A non-well-formed file cannot be reliably repaired without losing or duplicating content. Fix the generator and re-export.

What tools find the exact location?

xmllint --noout prints the line and column of the first failure. VS Code, IntelliJ, and oXygen XML Editor also pinpoint the offending byte.

Can encoding mismatches cause XML-001?

Yes — a file saved as Windows-1252 but declared UTF-8 will fail as soon as a non-ASCII character appears. Always write UTF-8 without BOM and keep the declaration consistent.

Should I strip control characters before validating?

Yes. Any character below U+0020 other than tab, line feed, and carriage return is forbidden in XML 1.0 and must be filtered before writing.

Error codes · ubl-2.1

XML-001Partly

Invoice file is not well-formed XML

This is the rejection, word for word: „[XML-001] XML-001 is raised when the invoice file fails XML well-formedness before any schema or Schematron rule can apply. The parser cannot build a DOM tree because the bytes do not conform to XML 1.0 grammar.“

What to have readyThe correct figures from your bookkeeping; we show you which field is affected.

What we doFix the generator — regenerate from the source system after correcting serializer bugs, encoding mismatches, or unescaped characters.

Choose the rejected invoiceor drop it here

XRechnung XML or ZUGFeRD PDF. Checking is free · corrected file €1.90 · the first every 30 days is free · no sign-up.

If you enter it yourself in your invoicing software

Before

<cbc:Note>Customer said: "the box arrived & it was damaged"</cbc:Note>

After

<cbc:Note>Customer said: &quot;the box arrived &amp; it was damaged&quot;</cbc:Note>

What the finding looks likeExample

FindingNeeds your check · XML-001

From youThe correct figures

ThenChecked again

ProofSHA-256 and /verify link after the check