[SOLVED]Is there a tool to find the id conflict and reassign the id?

Hello everyone,
When we merged two objects text file and import it, there maybe id conflict error popup(for example, two different functions in two files use the same id) and the import must be cancel.Then we must change the id manually and import it again, if we are not lucky doing the merge with two large customized objects, maybe over hundreds id conflict exists. ](*,) ](*,)

So is there any tools could analize the merged text file and find the id conflict, even more to reassign a new id automatically?
Does Object Management tool has this kind of utility?