When attempting to create and image, FreeDMG reports an error. The log shows "create failed - error 49168".
Norton Antivirus will cause FreeDMG to error when creating a disk image. The "auto-protect" option is preventing the newly created image from being ejected. Temporarily disabling auto-protect will allow the image to be created successfully.
Bug report: FreeDMG 0.5.2 was released with an uncaught bug. The program was not error checking for blank preferences. This behavior has been corrected (with a silent update).