====== My simulation fails. Any ideas? ======

Common mistakes are:
  - ''CUTOFF'' not converged. Anything below 200 is almost certainly too low. [[howto:converging_cutoff|Test the convergence explicitly]].
  - SCF cycle not converged.
  - Cell too small. Keep in mind that CP2K does **not** have k-point sampling.
  - atoms missing / wrong coordinates : visualize your geometry, including periodic images