Latest report on RealGM says Carmelo does not want to talk to any teams, NJN or NYK. He said it's the job of the front office to do the talking. I took it to mean he has no interest in signing on with NJN because that's the impending deal and he does not want it to happen.
NJN are not going to pull the trigger without Melo signing the extension.
I think Carmelo just thought that it was against the rules. That it would be tampering for him to talk to another NBA team while under contract with the Nuggets.
Once the Nuggets front office sits him down and explains the situation to him, that is okay for him to talk to other teams once Denver grants them permission beforehand .... I am sure Melo will want to hear the Nuggets out.