[news.eclipse.modeling.gmf] Exception when generating diagram code from

[Olivier PATRY <olivier.patry@xxxxxxxxxxxxxxxxxx>]

Hello,

I'm using Eclipse Ganymede (Modeling tools version) and working on a 
EMF/GMF project.

I follow the GMF process for code generation :
* .ecore
* .genmodel -> generate model (edit, editor)
* .gmfgraph
* .gmftool
* .gmfmap -> generator model
* .gmfgen -> generate diagram code
##### Exception :

Exception occurred while generating code
Ambiguous definitions 
xpt::editor::DocumentProvider::fileEditorInputClassFQName FOR 
gmfgen::GenDiagram and 
aspects::xpt::editor::DocumentProvider::fileEditorInputClassFQName FOR 
gmfgen::GenDiagram for param types []


I didn't understand this exception.
I saw a similar problem on this thread :
news://eclipse.modeling.gmf:80/c6f1ac739ee35b4cf43ba2846fe0151c$1@xxxxxxxxxxxxxxx

but the solution seems to be unappropriate for me, I didn't have the 
second problem mentioned by him.

Thanks,

Olivier PATRY