I’m trying to run the Blendernation Linux optimized build but it gives a missed

I’ve already installed libopenexr but it didn’t solve

Where can i get ?

Thank you very much!

Well, probably you already have it
Open the package manager, search for openexr and enable the
details or files view-the list of the files of the openexr package
Maybe your libhalf have a different name like or the like
If you have it just make a symbolic link, like:
ln -s /usr/lib/yourlib /usr/lib/ as root of course