error message when trying to "Erase Disk"

[John Kim]

I wish the problem had an error message ID to refer to, but it didn't.

Anyway, when trying to "Erase Disk" of a bootable memory stick (preloaded with Ubuntu), it gave this error message, which is in my attachment.

It was supposed to successfully "erase disk," but the error message came along.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: usb-creator-gtk 0.2.40
ProcVersionSignature: Ubuntu 3.5.0-6.6-generic 3.5.0
Uname: Linux 3.5.0-6-generic x86_64
ApportVersion: 2.4-0ubuntu5
Architecture: amd64
Date: Mon Aug 20 19:37:34 2012
ExecutablePath: /usr/bin/usb-creator-gtk
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120724.2)
InterpreterPath: /usr/bin/python2.7
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: usb-creator
UpgradeStatus: No upgrade log present (probably fresh install)