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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: bernd.moos@gmail.com (Thomas Schmidt)
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by: Thomas Schmidt - Tue, 20 Jun 2023 15:48 UTC

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?
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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

The first version always gets thrown away.

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

Subject	Author
Error 1224 (ERROR_USER_MAPPED_FILE) - what is it?	Thomas Schmidt
Error 1224 (ERROR_USER_MAPPED_FILE) - what is it?	R.Wieser