<div dir="ltr">There is a "known problem" (known at least to Don Hamann, the creator of the ONCV), I will paste part of a conversation I had with him a few years ago pertaining to the same problem:<div><br></div><div>"
<span style="font-family:"Times New Roman"">The Fe SG15 input data must have been on the "hairy edge" of </span><span class="gmail-il" style="font-family:"Times New Roman"">ghost</span><span style="font-family:"Times New Roman""> behavior. A small change of the local potential in the input should make it go away with the corrected 3.3.1, although I have not tested this yet. It is unfortunate that some other SG15 input may have the same issue, and I'm confident that such a small local-potential change should not effect the quality of the psp, but the whole set apparently needs review. Deep </span><span class="gmail-il" style="font-family:"Times New Roman"">ghost</span><span style="font-family:"Times New Roman""> detection was an innovation with 3.3.0, although the SG15 automated input data refinement using real solid-</span><span class="gmail-il" style="font-family:"Times New Roman"">state</span><span style="font-family:"Times New Roman""> calculations would certainly have rejected data that produced </span><span class="gmail-il" style="font-family:"Times New Roman"">ghosts</span><span style="font-family:"Times New Roman""> with 2.2.1</span> "</div><div><br></div><div>HTH!</div><div>Chris <br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">Group Leader "Theory of Quantum Systems at Surfaces"<br>IBS Center for Quantum Nanoscience<br>Seoul, South Korea<blockquote type="cite" style="font-size:12.8px"><div dir="ltr"><div><div dir="ltr"></div></div></div></blockquote></div></div></div></div>