|REBOL 3 Docs||Guide||Concepts||Functions||Datatypes||Errors|
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A function was evaluated that had multiple occurrences of a word defined in its specification block. For instance, if the word arg was defined as both argument one and two.
["Duplicate function value:" :arg1]
filter-error try [f: func [a /local a][print a]] ** Script Error: Duplicate function value: a ** Where: func [a /local a] [print a]
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