Case: If start of archive is corrupted, then there is no link to End Header.īut if the End Header is OK, and the size of archive is also correct,.In that case you must open archive in hex editor and look to Start Header and End Header. Header from the start or from the end of archive. "Can not open file 'a.7z' as archive", it means that 7-Zip can't open some If you try to open or extract archive and you see the message Corruption case: Can not open file 'a.7z' as archive The are no more instructions here for that corruption case. Good archives, logs of "test" command, and think about ways to replace bad parts. You must look listings of files in bad and Some files from archive, you can create similar archive with good copies ofįiles with same settings and in same order, and replace "bad" parts of bad.7z If archive was compressed in "Solid" mode, and you have exact copies of It's pretty difficult to recover data for that case. Here we describe the case, when you can open archive and you see the list of files,īut when you press Extract or Test command, there are some errors: Data Error or CRC Error.
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