If it's any consolation, the ability to swim wouldn't help, as your character would probably die of hypothermia (technically it would be suffocation, as the character's limbs would stop responding, with the resultant drowning) trying to swim in freezing cold water after crossing a rather limited number of tiles.
Anyway, if you'd like Sami to take a look at it you should zip up the save folder and either mail it to him or mail a link to a storage. In addition to that, you should also describe exactly which path you used to get where you are if you can (including descriptions of whether you used the overland or zoomed in map), as that ought to make it possible for him to try to replicate the trip.