Sorry to hear that. Then only thing I can suggest is perhaps your case is analogous but not identical to mine: that the problem shows up in Form 1116, but the actual source of the problem is in some other form. I changed nothing in the input to Form 1116, only in K-1 (obviously somewhere else in your case) One possibility would be to look at the forms where - in your case - the foreign income/taxes were originally declared. But it sounds like you have already done extensive checking, so maybe the problem is different in your case, unfortunately.
Good luck!
