Steps to execute a migration of data from a VNX Storage system to external storage equipment

Hi folks.

Please, I require your help to know the steps to 
start a migration of data from a VNX7600 storage
system to a non-Dell/EMC storage data.

Before to that, I've configure a new zonning between
the current VNX system and external target storage.
After that, I've tried to configure an internal
copy session with tool named "SAN Copy" but with 
failure results.

On external storage, an equipment non Dell equipment, 
I created new luns with similar size on new disk and 
getting information like 'uuid' and 'Lun Id'.

During the configuration of SAN Copy session, I used
the UUID and Lun information but with the result
message: "The destination device could not be found. 
This is probably due to incorrect FC zonning or iSCSI 
connection set or the device is not in the correct 
storage group."

Best regards,

Edu