Would I be correct in guessing that wine does not bother looking for WINS server when trying to resolve a name to an address? (Note that wine crashes as opposed to app complaining about servername)
You're correct that wine's gethostbyname function doesn't do a WINS lookup. It may be possible to configure your host to to a WINS lookup for gethostbyname using samba; check your samba docs. Wine's netbios() can use a WINS server, but I'm not sure what call your app is using. (Your relay trace appears to be some time after the problem happened.)
--Juan
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