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An EPackage name cannot be set to string containind dot ('.') characters. This used to work with the versions until mid-May 2011 while now (as of version 0.1.0.v201106191954 it makes Code Gen fail. The message is: Click the details button for more information, and check the Error Log view for any exceptions. Invalid EPackage: a.domandaaccr01 Diagnosis of file:<your path>/<your ecore>#/ The name 'a.domandaaccr01' is not well formed Note that from the book "EMF Eclipse Modelling Framework", Second Edition, it appears that EPackage-s should not have dots in their name as EPackage-s can be nested and each of their name may end up being a component in a dot-separated Java package name. So it should be first decided whether dots are to be allowed or not.
Yes previously the model was not validated before generating code, resulting in unclear behavior if there are errors in the model. So I added model validation before model code generation. This is the same as in the EMF genmodel. I checked and also the EMF genmodel does not allow dots in the package name. So I don't want to change this validation.
I decided to make a change to make it possible to have an epackage names with dots as it is really a pain when you have xsd's with namespace values with dots (which is quite logical to have). The solution is available in the latest build of Texo today.
