Hi<div><br></div><div>I'm using DIRECT_P_MIXING and when DIIS kicks in, things become unstable.  Any ideas what would be causing that?  I've included my input.  The system is copper oxide and I'm using PBEsol/pc-1 in the GAPW method.  Thanks! <br><img alt="Capture.PNG" data-iml="1130648.6000000238" width="550px" height="211px" src="cid:108260a3-2850-484b-a230-cdbd923cfc6b"></div>

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