In most cases you will get this error message if you didn't log in or the login session expired - can you make sure you run "scli --login --username admin --password" first?  If you are logged in for sure and the command is still failing, can you run any other scli commands?  cheers, Pawel
I was trying to check the ongoing traffic of the system by running following command:  root[NAME]-3-1:~# scli --query_properties --object_type SYSTEM --all_objects --preset IO Error: MDM failed command.  Status: Invalid session. Please login and try again.  But getting the same error each time. I tried to run this command on all scaleio nodes;MASTER as well as SLAVE.
Error: MDM failed command. Status: Invalid session. Please login and try again.