[Wien] Optic within GGA for correlated electron systems

[ali ghafari]

Dear Prof. Blaha and Users

for calculations of optic properties (page 157 of UG), in the metalic system we should put "TETRA = 101". 
As you know GGA functional fails to find a gap for correlated electron systems and it predics a metallic behavior.
My question is, should we put "TETRA = 101" for the correlated electron systems?
Best Regards?   
 
Ali
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