I am trying but it seems that closechroot search for a lock created by qmount.
But qmount isn't executed if we use "none" option and so closechroot not works

EDIT:
Problems found:

• I confirm that closechroot not works but there is a simple workaround (waiting a new release of EasyChroot).
  After entering on chroot execute echo "none" > /var/lock/qmount-complete as first command.
  Now closechroot will work with only a negligible error (it still tries to umount with qumount the chroot target folder).
• Some scripts work with relative path but others need always absolute path.
  • qchroot works with relative path
    
    Code:

    cd /home/user
    sudo qchroot /dev/mmcblk1p2 my-chroot-folder/

  • qmount work with relative path
    
    Code:

    cd /home/user
    sudo qmount /dev/mmcblk1p2 my-chroot-folder/

    Still works with sudo qmount /dev/mmcblk1p2 ./my-chroot-folder but not with sudo qmount /dev/mmcblk1p2 my-chroot-folder
  • qumount not works with relative path, it works only with
    
    Code:

    cd /home/user
    sudo qumount /home/user/my-chroot-folder/

  • closechroot not works with relative path, it works only with
    
    Code:

    cd /home/user
    sudo closechroot /home/user/my-chroot-folder/