Hi Asha, > ATOMIC_SPECIES > Mn 54.94 Mn.pbe-sp-van.UPF > Ce 140.116 Ce_lda_sc.UPF > O 16.00 O.pz-rrkjus.UPF > > Is there some problem with pseudopotential file?? yes.You must have the same pseudopotential file.Like they are all pbe or pw or others.