Group separator must be a single character/codepoint.
The group separator passed to xdmp:format-number contains more than one character or codepoint.
Correct your code to use a single character/codepoint group separator.
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Stack Overflow: Get the most useful answers to questions from the MarkLogic community, or ask your own question.Stack Overflow: Get the most useful answers to questions from the MarkLogic community, or ask your own question.