Comment 3 for bug 876154

These errors are very confusing and means that - in order to get help - they either have to be able to read and understand the Wubi log file, or post it somewhere for someone to read.

These problems are caused by coding bugs. Wubi needs to exit when it encounters the 'salient' error e.g. "ISO is the wrong size". Rather than setting the attributes to "None" and then continuing to try something new. It eventually is encountering some code that expects the attribute to be set, and throws the exceptions. At least this is my analysis.

These new confusing messages were introduced in 11.10 - probably when the preinstalled image install was introduced.

PS here is a link to a partial log file where the latest message I added was taken from:
http://askubuntu.com/questions/106575/how-can-i-resolve-a-windows-backend-object-has-no-attribute-iso-path-error-wh