Thanks steve, I have searched the internet for an answer but still have not found it.
However, it seems a very controversial topic.
I tried to translate 6 pages of this thread that is not in my language:http://mva.pl/viewtopic.php?f=21&t=968
where I assume that users have found the solution but unfortunately I do not understand the conclusion.
From what I read they also have tried to ask directly to eizo who denied the ability to upload 3dlut internally in the model CX240.
Although this seems to me to guess that it is just a software limitation.
For this reason I asked you if you can access the 3dlut the CX240 via lighstpace.
In the end I believe more in your reply that in that of eizo.