Failed to retrieve product license information.

ExpressCache service is running , caching is enabled , and the used portion is 12-15GB.

So you gives me this idea:

stopping, then restarting the ExpressCache service and after that, eccmd-info runs correctly;

since yesterday, with no more problem.

NB : before stop/restart service, I have uninstal/reboot/instal a fresh unloaded version of ExpressCacheSetup (same version),

but the problem was not resolved.

Maybe reinstal and restart has correct this problem, who knows ?

Once more, I thank you for your good advice.

Phil