Editing VASP beginners (section)

==Please update in the hands-on==  
* The energy cutoff is specified with '''ENCUT''', not ENMAX or EMAX. 
* The energy cutoff should be set in '''all [[INCAR]]''' files, and it should be consistent along all calculations for a given project. Please Use 500 for the hands-on.  
* The comments in the INCAR file should be introduced with '''#''', not '''!'''.   
* POSCAR files should not include any comments. 
* Use '''ISMEAR'''=0 (conductors&isolators). You may use ISMEAR=1 only for conductors, but it is not recommended. Avoid ISMEAR=2. 
* The density functional should always be included in the [[INCAR]] file. Start with PBE (GGA = PE).   
* The POSCAR file (VASP 5 and higher) lists the elements on line #6, which are omitted in the hands-on. 
* For ionic relaxations, use force criteria, where EDDIF must be 1E-3 times lower than EDDIFG. (For energy criteria, 1E-1 would suffice).   
* For frequency calculations, use between 1E-7 to 1E-8 eV per atom (eg, EDDIF 1E-5 would be OK for a large cell with 300 atoms).