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How to fix: Content is not allowed in trailing section.

What happened?

XML files must have exactly one root element. If there's text, whitespace, or extra XML after the closing tag of the main element, the parser rejects the file. This often happens when files are concatenated or edited manually.

The Zero-Tolerance Solution

XMLExpress generates clean, single-root XML artifacts every time — no trailing content, no extra whitespace, no concatenation artifacts.

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