XMI import - Failed to load metamodel

Hello everyone

I am trying to import a xmi file with PowerAMC 16.5 SP03 (I choose the "Analyse" language).

But everytime I get this message :

Failed to load metamodel with urm 'urn:emf:http://www.eclipse.org/uml2/2.1.0/UML' on platform 'urn:m3al:emf:2.4.2'

Nom du paramètre : metamodelUrms

Have you got any idea of what could be wrong here ?

Thanks in advance.