I have nine files with extension abc.z01 to abc.z09

How to join them?

winrar,winzip and 7zip fails to join or extract them

To be able to extract the data from the split files, you can use WinZip. Since you mention that the process fails, it would seem to me that you may not have all of the required files in that split.

Thanks.

main file was missing.
winrar,winzip doesn't worked but 7zip worked well.

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