draftsight dual dimension suffix

I am trying to use dual dimensions, with millimeters as the second dimension in parenthesis. When I turn the dual dimension on, and add a suffif  "mm" I get a dimension that looks like this:

2'-6" [762<>mm]

I get a "<>" less than/more than symbol in betwwen the dimension and the suffix.

how do I get the "<>" symbols to not show up?

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