https://bugs.winehq.org/show_bug.cgi?id=51513
--- Comment #11 from Esme Povirk madewokherd@gmail.com --- I made a PR for the unsupported codepage: https://github.com/madewokherd/mono/pull/19
If this program turns out to be nontrivial enough that we need more tracking, we should make a new bug, as the original IndexOutOfRangeException has been fixed in the develop branch (and will be fixed in Wine on the next Wine Mono update).