Hi dnaldoog,
Thanks for your comment. I succeeded in programming my interface for my Nord Electro.
Yet, I still have a small problem when sending a program midi dump. Most of the controller messages are well received and the modulators in the interface are changed accordingly. But some are not. If I send again a midi dump, the missing messages are received. Sometimes, I have to send three or four times for all the modulators take the values of the synth program. It seems that the controller messages are sent too quickly. Is that possible?