Dear *,<div><br></div><div>I am trying to perform a TDDFPT calculation with PBE0. My system is a Si(100) surface with tetracene adsorbed. Tetracene forms some kind of film on top of the Si(100) surface (see the attached .xyz file).</div><div>While the PBE calculations works quite smoothly, I have quite some problems to get the PBE0 ground state calculation done. To be honest I am quite new to cp2k and I am pretty sure that I miss smth important and that the error is on my side here. I would be very thankful for any kind of hints and tips regarding this issue with my calculation.</div><div><br></div><div>I am using ADMM.</div><div><br></div><div>The first issue which appears is:</div><div><br></div><div>The Kohn Sham matrix is not ***<br> *** 100% occupied. This may result in incorrect Hartree-Fock results.<br></div><div><br></div><div>I also get the error:</div><div> POWELL| Error in trust region<br></div><div><br></div><div>I followed the link given in the output file, I can get rid of this warning by adjusting EPS_PGF_ORB to 1E-32 (I found this value in some older post here in the google group) but this does not seem to be a good practice approach to me.</div><div>Nevertheless, cp2k continues but the convergence is not very good. However, using a PBE restart-wfn it seems to converge quite well.</div><div><br></div><div>Thanks for any kind of help, and happy hollidays!</div><div>Matthias</div><div><br></div>
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