I was wrong. Getting excited with the learning of the things I can do I overlooked this important detail.
Before going on with the development of this script which is taking time cause I´m a beginner do you think it's worth trying? I mean, considering that UpdateScsiLunDisplayName onlyoperates on the LUN id, and considering that in large environments LUNs come easily from different targets and so can have duplicated LUN id, is it worth creating a script to automate this task in an environment like that? I guess that regardless of the approach UpdateScsiLunDisplayName is the only command that does that task. At the end of the day it´s just the display name of the LUN, no config involved, but I guess I´ll end up with incorrect labels on some LUNs? Many thanks again!