Generating XSD Schema

[Appollo]

I have a class diagram with XSD types, and when I try to generate XSD schema (Code Engineering-> Generate XSD schema), I get the following error (in Progress text area on Generate XML schema dialog):

One or more Packages missing Fileame.

I get that message/error, even if I select "Prompt when Filename" checkbox.

Any help would be appreciated.

Thank you,

[salayande]

It appears like a reference issue.
It is a type of problem best solved by sending the model file to Sparxsystem.