Originally Posted by
thunderlounge
PL STL D DFW I LHR I DUB XX CDG I DFW D STL
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It looks like the XX is throwing it off when combined with a fare code between airports. Each work independently, but when combined es no bueno.
Thanks, in the meantime try PL STL D DFW I LHR I DUB , CDG I DFW D STL (with a comma).