I want to make a bootable usb stick with an windows image, but there is always an error message. I use WoeUSB.

I did already in the terminal umount /dev/sdb1 and and unlock from the launcher, format with gparted fat and ntfs but no success.

it is written: You must specify a different --target-filesystem (probably ntfs or exfat)

Now i have tried 'ext4' and unformatted, exfat is not dark and not possible. ntfs i have already tried.

Can you show us which error you got when you tried NTFS?

Installation failed!
Exit code: 256
Log:
WoeUSB v@@WOEUSB_VERSION@@
==============================
Error: Target device is currently busy, unmount all mounted partitions in target device then try again
Target device is busy, please make sure you unmount all filesystems on target device or shutdown the computer before detaching it.

when i want to umount with the command 'umount /dev/sdb1' appears the error

berni@berni:~$ umount /dev/sdb1
Error unmounting block device 8:17: GDBus.Errorrg.freedesktop.UDisks2.Error.Failed: Error unmounting /dev/sdb1: Command-line `umount "/media/berni/Win 7 64 bi"' exited with non-zero exit status 32: umount: /media/berni/Win 7 64 bi: not mounted

you need to explain what are you doing, just dropping in an error message is meaningless.
Actually the last error message means nothing: /dev/sdb1 was not mounted, therefore cannot umount.

I want to make a bootable usb stick with an Windows iso file using WoeUSB shown in Video tutorial https://www.youtube.com/watch?v=W7WpWEUSwmg.

I've never used this software but the tutorial on it at the link below states that it requires an ntfs formatted disk.

https://itsfoss.com/bootable-windows-usb-linux/

And as stated above, the message shows that the filesystem on the partition you tried to unmount was not mounted and you did it as a user without root/sudo privileges which is generally necessary.

Do not tell us what do you want, but exactly what did you make and what's happened. http://catb.org/~esr/faqs/smart-ques...html#beprecise

My System is Ubuntu 16.04 LTS / Intel Core i3 CPU M390 2.67 Ghz x 4 / 64 bit / Memory 3.7 Gb

Usb Stick ScanDisk Ultra Usb 3.0 16Gb (but i tried different sticks)

At first I started WoeUSB, than I select the WIN10.iso, than i put in the Usb Stick to my Usb Hub, than recognizes ubuntu the stick
and I have two times to press refresh at WoeUSB software.

After pressing install appears the error message:

Installation failed!
Exit code: 256
Log:
WoeUSB v@@WOEUSB_VERSION@@
==============================
Error: Target device is currently busy, unmount all mounted partitions in target device then try again
Target device is busy, please make sure you unmount all filesystems on target device or shutdown the computer before detaching it.

ok, so start over again.
umount/eject/remove the usb stick first. Wait a bit and put it back into the hub. Again wait until ubuntu reports it is ready. Next umount it again, but do not eject or remove. Next start WoeUSB and try to install.
please post again all the steps you made in case of error and also the error message.

I think I have to umount from the Terminal, but there occurs an error:

berni@berni:~$ umount /dev/sdb1
Error unmounting block device 8:17: GDBus.Errorrg.freedesktop.UDisks2.Error.Failed: Error unmounting /dev/sdb1: Command-line `umount "/media/berni/Win 7 64 bi"' exited with non-zero exit status 32: umount: /media/berni/Win 7 64 bi: not mounted

From the graghical interface it is only 'Unlock from Launcher' or 'Eject' possible.

I think umount/eject/remove are three different actions, isn't it ?

Umount by Terminal, Eject from graphical interface and remove is a physical action.

The next error message occurs when i want to eject:

Unable to eject 16 GB Volume
Error unmounting /dev/sdb1: Command-line `umount "/media/berni/Win 7 64 bi"' exited with non-zero exit status 32: umount: /media/berni/Win 7 64 bi: not mounted

It is possible to post screenshots or similar things?