I am having a problem copying the contents of a folder to another, actually
a flash drive. One of the files to be copied is a zip file (call it
abcdefg.zip). The copy process in Win Explorer starts without incident but
stops copying files when it hits the zip file. The error message says:
"Cannot copy abcdefg: Data error (Cyclic redundancy check)" I have no idea
what this means (well I know it is some mathematical test checking for
errors of some sort, but don't quote me). Is there a Windows XP issue
copying zip files? Or does this mean there is something wrong or corrupted)
with my specific zip file? I don't have any other zip files laying around
so I am not able to see if the issue is limited to this particular file. If
it is simply a corrupted file, I can fix things. Thanks!

It generally means a corrupted file.

"Joe McGuire" <(E-Mail Removed)> wrote in message
news:%(E-Mail Removed)...
>I am having a problem copying the contents of a folder to another, actually
>a flash drive. One of the files to be copied is a zip file (call it
>abcdefg.zip). The copy process in Win Explorer starts without incident but
>stops copying files when it hits the zip file. The error message says:
>"Cannot copy abcdefg: Data error (Cyclic redundancy check)" I have no idea
>what this means (well I know it is some mathematical test checking for
>errors of some sort, but don't quote me). Is there a Windows XP issue
>copying zip files? Or does this mean there is something wrong or
>corrupted) with my specific zip file? I don't have any other zip files
>laying around so I am not able to see if the issue is limited to this
>particular file. If it is simply a corrupted file, I can fix things.
>Thanks!
>

"Joe McGuire" wrote in message
news:%(E-Mail Removed)...
>I am having a problem copying the contents of a folder to another,
>actually a flash drive. One of the files to be copied is a zip file
>(call it abcdefg.zip). The copy process in Win Explorer starts
>without incident but stops copying files when it hits the zip file.
>The error message says: "Cannot copy abcdefg: Data error (Cyclic
>redundancy check)" I have no idea what this means (well I know it is
>some mathematical test checking for errors of some sort, but don't
>quote me). Is there a Windows XP issue copying zip files? Or does
>this mean there is something wrong or corrupted) with my specific zip
>file? I don't have any other zip files laying around so I am not
>able to see if the issue is limited to this particular file. If it
>is simply a corrupted file, I can fix things. Thanks!
>


Are we to guess if you are copying the folder (which is the .zip file)
or are trying to copy the content of the folder (which are the files
crammed into the .zip folder)? Sounds like you are copying files from
within a .zip file but the content is corrupted. The CRC hash is used
to verify that what was put into the .zip file (which are not files
anymore but just delineated content) is what gets extracted from that
..zip file. You have a bad .zip file.

You never bothered to mention what application created the .zip file
or how YOU are accessing its contents. Zip is supported in Windows XP
but only with minimal functions. 3rd party zip programs often let you
extract despite the warning that what you will get is not what was
attempt to put into that .zip file.

Joe McGuire wrote:
> I am having a problem copying the contents of a folder to another, actually
> a flash drive. One of the files to be copied is a zip file (call it
> abcdefg.zip). The copy process in Win Explorer starts without incident but
> stops copying files when it hits the zip file. The error message says:
> "Cannot copy abcdefg: Data error (Cyclic redundancy check)" I have no idea
> what this means (well I know it is some mathematical test checking for
> errors of some sort, but don't quote me). Is there a Windows XP issue
> copying zip files? Or does this mean there is something wrong or corrupted)
> with my specific zip file? I don't have any other zip files laying around
> so I am not able to see if the issue is limited to this particular file. If
> it is simply a corrupted file, I can fix things. Thanks!
>
>
Not being smart, but google "CRC" or "Cyclic redundancy check". There
are a ton of sources out there. Like:
In simple terms, a CRC is bit of mathematics used to ensure that your
data is OK when being transfered. It's a checking procedure that
quickly identifies when data has been damaged. If you get this message,
it means that the file being read by your PC or software is corrupted.

But like others have said, something is wrong with the file and that
might be the tip of the iceberg.