Vim74: E149 Sorry no help for help.txt” on Stack Overflow seems (to me) to be asking much the same question as “Vim - errors E433 No tags file, E149 No help for help.txt” on Super User. That second question has what I think is a good answer, but of course that’s not on Stack Overflow, and I’m not sure that such a question doesn’t belong on Stack Overflow (nor even that it instead doesn’t belong on Super User).

I don’t necessarily like the idea of an answer simply saying “See the answer to this question on Super User” (and indeed, although I did attempt to post such an answer, it was deemed Trivial and converted to a comment), but in the case of a user coming across this question (say) by means of searching, I’d like there to at least be a link to the answer on Super User so that the question isn’t a dead end. What’s generally supposed to be done in this sort of case?

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    +1, happened to me once before. I wouldn't mind being able to mark as duplicate cross-site. – Dave Chen Oct 6 '13 at 3:11
  • Note that you should never have an answer just containing a link (nor should you copy an answer from elsewhere on the Stack Exchange network). A comment is more appropriate. – Bernhard Barker Oct 6 '13 at 3:53
  • In the question which this was marked as a duplicate of, I didn’t see advice on how to answer a question such as this — only that it could be migrated, which, as I thought I made clear in the question, I don’t think is the solution — this could well be an on-topic and helpful Q/A on both sites. Stack Overflow is left therefore with a question which remains “unanswered” and no non-comment means of directing someone who finds it to where there’s an actual answer. – Ben Klein Oct 6 '13 at 12:41