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I have a RAR I downloaded made up of multiple files. When trying to extract it, it tells me the data is incomplete, something bad with one of the files. Considering I had to download multiple large files, is there a way to find out exactly which of the files I should re-download?

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up vote 1 down vote accepted

Look at MacPar deluxe it checks each part - and if the parts include .par files it can recover from some errors

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"A checksum error (2) occurred during Unrar, or an invalid password was entered" hmm... (there was no password - and not sure how the checksum thing helps). But good software otherwise. – nute Aug 2 '11 at 13:39
If a rar is split up then it should use .par files to help spot where the error is – Mark Aug 2 '11 at 13:41

UnRarX also has an option to test archives without extracting them.

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