Dear Dr. Postnikov and Ravi, thanks for your reply.
It is odd, I have already followed what you mentioned in your emails 1. same systemlabel 2. same folder 3. not preceding by a false XV using command !!!! Still I receive the warning !!!! below is my input: SystemName GaNPSS SystemLabel GaNPSS NumberOfSpecies 4 NumberOfAtoms 72 %block ChemicalSpeciesLabel ;;;;;;;;;;;; ;;;;;;;;;;; %endblock ChemicalSpeciesLabel %block PAO.BasisSizes ;;;;;;;;;;;;;;;;;;;;;;;;;;;;; %endblock PAO.BasisSizes Diag.Divide-and-Conquer F LatticeConstant 1 Ang %block LatticeParameters ;;;;;;;;;;;;;;;;;;;;;;; 90 90 90 %endblock LatticeParameters AtomicCoordinatesFormat Ang %block AtomicCoordinatesAndAtomicSpecies ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; %endblock AtomicCoordinatesAndAtomicSpecies %block kgrid_Monkhorst_Pack 2 0 0 0 0 2 0 0 0 0 12 0 %endblock kgrid_Monkhorst_Pack XC.functional LDA XC.authors CA Solution.Method diagon MeshCutoff 400 Ry DM.Tolerance 1.d-5 DM.NumberPulay 3 MaxSCFIterations 150 WriteCoorStep .true. WriteForces .true. WriteKbands .true. WriteCoorXmol .true. WriteBands .true. MD.TypeOfRun CG MD.VariableCell .false. MD.NumCGsteps 0 MD.MaxForceTol 0.01 eV/Ang DM.MixingWeight 0.1 MD.UseSaveXV .true. UseSaveData .true. Regards,