Hi Alexey,
Now I understand better the error.
You're trying to open a model (with the standard XMI Reflective Editor) whose metamodel has not been registered in the EMF registry. As a consequence, the Editor cannot open it and simply displays the error you mentioned.
Before opening it, you need to register (in the EMF registry of Eclipse) the XML metamodel this generated model conforms to. For doing so, you have to right-clik on it and select the "Register metamodel" action.
I will send you by email this XML metamodel in Ecore.
Best regards,
Hugo
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