If I run a band structure calculation, and then go to the analysis dialog and hit "view" on the band structure, CASTEP will display all of the occupied bands, but only 12 bands above the Fermi level (Ef) for organic semiconductors such as oligoacenes (i.e., naphthalene, anthracene, tetracene, pentacene)? I have 90 such calculations on similar materials and they all have the same 12 band cutoff. I can't find any info on why this is the case or on how to change this...any ideas?