Why does Range.Sort work typed in one way but not another?

[Blue_Diamond]

When I have the following, the code does not work:

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However, the following code does work:

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Why does the first way not work?

[AlphaFrog]

Try it without the parentheses.

R.Sort WS.Columns(4), xlAscending, WS.Columns(11), , xlAscending