Same problem here.

When I use an ftp site through Dolphin and I try to create a folder or a file I get a red warning:

A file with name ‘Text File.txt’ already exists

A file with name ‘New Folder’ already exists.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 
NAME="KDE neon"
VERSION="5.20"
ID=neon
ID_LIKE="ubuntu debian"
PRETTY_NAME="KDE neon User Edition 5.20"
VARIANT="User Edition"
VERSION_ID="20.04"
KDE Plasma Version: 5.20.4
KDE Frameworks Version: 5.77.0
Qt Version: 5.15.2


When I right click to create a new folder and the name window pop up, after a while (a couple of seconds) an alert says "examinating (finished).

If I'm quick enough to confirm I can create the file/folder, otherwise the OK button becomes disabled.

It doesn't happen with fish/ssh protocol, I can't try with samba.

(In reply to Giorgio from comment #1)
> It doesn't happen with fish/ssh protocol, I can't try with samba.
Thanks for your comment; after I changed the protocol from ftp to sftp and the port from 21 to 22, I was again able to create files & folders on the network drive.

I can live for the moment with this workaround.

Created attachment 134226 [details]
attachment-6287-0.html

Happy it was helpful for you. Unfortunately ftp is essential for me. And
downgrading kio nor kio-extras does not work for me.

On Sun, 20 Dec 2020 at 12:36, Martin Schnitkemper <bugzilla_noreply@kde.org>
wrote:

> https://bugs.kde.org/show_bug.cgi?id=429541
>
> --- Comment #2 from Martin Schnitkemper <martin.schnitkemper@nexgo.de> ---
> (In reply to Giorgio from comment #1)
> > It doesn't happen with fish/ssh protocol, I can't try with samba.
> Thanks for your comment; after I changed the protocol from ftp to sftp and
> the
> port from 21 to 22, I was again able to create files & folders on the
> network
> drive.
>
> I can live for the moment with this workaround.
>
> --
> You are receiving this mail because:
> You are on the CC list for the bug.

(In reply to Giorgio from comment #3)

> Happy it was helpful for you. Unfortunately ftp is essential for me. And
> downgrading kio nor kio-extras does not work for me.
You tried kio-5.75.0? That did it for me, but since I am not sure of site effects, if I mix outdated with current software, I am staying on the latest release (now 5.77.0).

Bugreport is open since a month and still in status REPORTED, so I don't believe in a fast solution from the devs.

(In reply to Martin Schnitkemper from comment #4)
> You tried kio-5.75.0? That did it for me, but since I am not sure of site
> effects, if I mix outdated with current software, I am staying on the latest
> release (now 5.77.0).

I tied several versions of both kio and kio-extras:
kio=5.76.0-0xneon+20.04+focal+build18
kio=5.75.0-0xneon+20.04+focal+build17
kio=5.75.0-0xneon+20.04+focal+build16
kio-extras=4:20.08.3-0xneon+20.04+focal+build19
kio-extras=4:20.08.3-0xneon+20.04+focal+build19 kio-extras-data=4:20.08.3-0xneon+20.04+focal+build19
kio-extras=4:20.08.3-0xneon+20.04+focal+build18 kio-extras-data=4:20.08.3-0xneon+20.04+focal+build18
kio-extras=4:20.08.3-0xneon+20.04+focal+build17 kio-extras-data=4:20.08.3-0xneon+20.04+focal+build17
kio-extras=4:20.08.2-0xneon+20.04+focal+build17 kio-extras-data=4:20.08.2-0xneon+20.04+focal+build17

And as you I'm staying at 5.77

Why has the platform of the report been changed from "Archlinux Packages" to "Neon Packages"?

I as the reporter of the bug have to set the platform where the bug has been observed, and that was "Archlinux Packages" and not "Neon Packages". Even if it also exist on other platforms, I can only confirm that it exist on that platform where I observed it, and the value should be kept on the value the reporter has been set while creating the report. 

Reverted to the original value.

Sorry Martin, I was convinced I started the bug and that I erroneusly reported it under Arclinux Packages.

Anyway I confirm I have the same issue in Neon.

Confirmed with KF 5.77.0 and Dolphin 20.12.0.

*** Bug 432794 has been marked as a duplicate of this bug. ***

*** Bug 432231 has been marked as a duplicate of this bug. ***

Pretty bad bug; raising priority.

I did some investigation.

The issue is the new file dialog check files existence and hit a limitation in the ftp ioslave
 https://invent.kde.org/frameworks/kio/-/blob/master/src/ioslaves/ftp/ftp.cpp#L1317

I guess we fix this by stating with KIO::StatJob::StatSide::DestSide in https://invent.kde.org/frameworks/kio/-/blob/master/src/filewidgets/knewfilemenu.cpp#L1212

A possibly relevant merge request was started @ https://invent.kde.org/frameworks/kio/-/merge_requests/380

Git commit 71c7420e4b33b4bace8ed6d4fa45fa5e281d38bd by Méven Car.
Committed on 27/03/2021 at 10:00.
Pushed by dfaure into branch 'master'.

KNewFileMenu: use destination side to stat destination

M  +1    -1    src/filewidgets/knewfilemenu.cpp

https://invent.kde.org/frameworks/kio/commit/71c7420e4b33b4bace8ed6d4fa45fa5e281d38bd

Confirmed working on git master. Thanks.

*** Bug 419560 has been marked as a duplicate of this bug. ***

*** Bug 432156 has been marked as a duplicate of this bug. ***

(In reply to Méven Car from comment #14)
> Git commit 71c7420e4b33b4bace8ed6d4fa45fa5e281d38bd by Méven Car.
> Committed on 27/03/2021 at 10:00.
> Pushed by dfaure into branch 'master'.
> 
> KNewFileMenu: use destination side to stat destination
> 
> M  +1    -1    src/filewidgets/knewfilemenu.cpp
> 
> https://invent.kde.org/frameworks/kio/commit/
> 71c7420e4b33b4bace8ed6d4fa45fa5e281d38bd

What will be the stable release that will have the fix?

Frameworks 5.81. You can see in the "version fixed in" field.

Well the bugs is still here. Using a FTP I created a new folder, then I could not paste files inside it

Dolphin 20.12.2
KDE Frameworks 5.81.0
Qt 5.15.2
Plasma 5.21.5
Fedora 34

I can confirm, that the problem has been solved in both distributions, "Arch" and "KDE neon", since both are on Frameworks 5.81.

But I still discovered another strange behaviour: if you create a new folder, then a name "New Folder" is offered, and if you try to create another folder, it is automaticly named as "New Folder (1)".  Not so on a file: first offer is i. e. for a textfile "Text file.txt" and if you try to create another one, "Text file.txt" is offered again and you get the "already exist" warning and has to correct the filename to continue. 

That happen only on a ftp share, not on a local device; there you get an offer like "Text file (1).txt".  

That does not really annyoing me, just want to mention it.

(In reply to Germano Massullo from comment #20)
> Well the bugs is still here. Using a FTP I created a new folder, then I
> could not paste files inside it
Can it be permission problem that you have no write access on the folder?

I just tried it, I can create a new folder and a textfile in the new folder, and can also drag & drop a file from the local filesystem to the remote filesystem.  For me it works as designed.

Thank you, the problem is no more present on my system.

But when I create a new folder I get the notification

"Examination (Failed)"

It's only annoying, not a blocking issue.

Operating System: KDE neon 5.21
KDE Plasma Version: 5.21.5
KDE Frameworks Version: 5.81.0
Qt Version: 5.15.2
Kernel Version: 5.4.0-73-generic

(In reply to Giorgio from comment #23)
> But when I create a new folder I get the notification
> 
> "Examination (Failed)"

The filesystem is probably not clean.  Try to unmount the volume and perform a fileysystem check.

Thank you Martin for your reply.

Sorry, I'm not sure to understand your suggestion.

I'm logging in to a remote server, I can't unmount it and perform a check. Or are you talking about my local system?

(In reply to Giorgio from comment #25)
> I'm logging in to a remote server, I can't unmount it and perform a check.
> Or are you talking about my local system?
I assumed that it was a system like a NAS where you signed on.

If you have no physical access to the server, you should ask your service provider for assistance.  He can probably also explain the facts behind the error message.  I think that the problem is not related to the reported bug.

Thank you very much for your assistance!

(In reply to Martin Schnitkemper from comment #26)
> I think that the problem is not related to the reported bug.

(In reply to Martin Schnitkemper from comment #22)
> (In reply to Germano Massullo from comment #20)
> > Well the bugs is still here. Using a FTP I created a new folder, then I
> > could not paste files inside it
> Can it be permission problem that you have no write access on the folder?

It's not a permission problem. On Dolphin:
1) I copied a file from my localhost
2) I then entered ftp://x.x.x.x/
3) [Current folder: ftp://x.x.x.x] I created /foo folder and entered into it
4) [Current folder: ftp://x.x.x.x/foo] I could not paste anything
5) [Current folder: ftp://x.x.x.x/foo] I created folder bar
6) [Current folder: ftp://x.x.x.x/foo] (please note that current folder still is /foo) Now I was finally able to paste the file I copied in step 1), just because I created a bar folder inside foo......

Please read https://bugs.kde.org/show_bug.cgi?id=419560#c2