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devel / comp.os.ms-windows.programmer.win32 / Re: Error 1224 (ERROR_USER_MAPPED_FILE) - what is it?

SubjectAuthor
* Re: Error 1224 (ERROR_USER_MAPPED_FILE) - what is it?余风
`* Re: Error 1224 (ERROR_USER_MAPPED_FILE) - what is it?Thomas Schmidt
 `- Re: Error 1224 (ERROR_USER_MAPPED_FILE) - what is it?R.Wieser

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Re: Error 1224 (ERROR_USER_MAPPED_FILE) - what is it?

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Subject: Re: Error 1224 (ERROR_USER_MAPPED_FILE) - what is it?
From: yufeng05020213@gmail.com (余风)
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 by: 余风 - Tue, 9 Nov 2021 06:46 UTC

在 2021年1月31日星期日 UTC+8 上午1:44:48，<Pooja Batra> 写道：
> On Thursday, 7 February 2008 at 00:39:56 UTC+5:30, nicolas....@gmail.com wrote:
> > On Feb 4, 10:31 am, "Charlie Gibbs" <cgi...@kltpzyxm.invalid> wrote:
> > > In article <dte8q397ojqa5lotc64ieojt56atgua...@4ax.com>,
> > >
> > > Dav...@example.invalid (David Lowndes) writes:
> > > >> Occasionally, when I try toopenafilefor writing, I get error code
> > > >> 1224 (ERROR_USER_MAPPED_FILE). The full text corresponding to this
> > > >> code is "Therequestedoperationcannotbeperformedon afilewith
> > > >> auser-mappedsectionopen."
> > >
> > > >> This condition only occurs once in a while, at a couple of the 2000
> > > >> or so installations where this program runs (under Win2K or XP).
> > >
> > > > I'd suspect interference from an anti-virus program. Can you check if
> > > > these users have an AV installed, and whether the problem disappears
> > > > if they remove it.
> > >
> > > Thanks, I'll check that one out.
> > I've had this, and initially thought that I had too many files open
> > (forgot to close some files)
> > Actually, when reading other answers, I realized I have a regular
> > automatic backup that runs on the affected files.
> How the issue got resolved? I am getting same error randomly
I also got same error randomly，so have you resolved the problem？thx

Re: Error 1224 (ERROR_USER_MAPPED_FILE) - what is it?

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Subject: Re: Error 1224 (ERROR_USER_MAPPED_FILE) - what is it?
From: bernd.moos@gmail.com (Thomas Schmidt)
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 by: Thomas Schmidt - Tue, 20 Jun 2023 15:48 UTC

In my case (writing 6000 files via a Java program), the problem seemed to be Dropbox synchronisation somehow blocking the file writing. Paused Dropbox synch, error gone.

- Thomas

Re: Error 1224 (ERROR_USER_MAPPED_FILE) - what is it?

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From: address@is.invalid (R.Wieser)
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Subject: Re: Error 1224 (ERROR_USER_MAPPED_FILE) - what is it?
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 by: R.Wieser - Tue, 20 Jun 2023 16:52 UTC

Thomas

> the problem seemed to be Dropbox synchronisation somehow blocking the
> file writing. Paused Dropbox synch, error gone.

Sounds like a reason :

[quote]
The full text corresponding to this code is "The requested operation cannot
be performed on a file with a user-mapped section open."
[/quote]

https://groups.google.com/g/comp.os.ms-windows.programmer.win32/c/plQmyXqAeOI

IOW, if DropBox is has a file open using a memory-mapped file method than
the writing to that same file using normal means is likely disallowed (the
files contents on the disk and the already-present "view of file" - cached
file contents - would mismatch).

One possible solution (no idea if you can delete a file that is
memory-mapped though) could be to delete the target file before writing a
fully new one.

Regards,
Rudy Wieser

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