If you require more than 200 optimization steps, lets say 300 total, then add the following:<div><br /></div><div>&MOTION<br /> &CELL_OPT<br /> KEEP_SYMMETRY<br /> OPTIMIZER CG</div><div> MAX_ITER 300<br /> &END CELL_OPT</div><div>&END MOTION<br /><br /></div><div class="gmail_quote"><div dir="auto" class="gmail_attr">On Tuesday, January 31, 2023 at 9:16:23 PM UTC-8 itsku...@gmail.com wrote:<br/></div><blockquote class="gmail_quote" style="margin: 0 0 0 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Dear Cp2k community<div>I am a novice to cp2k software, and i have been trying to optimize a structure using cp2k but after 200 iterations it gives this result:</div><div><b> *******************************************************************************<br> *** BRENT - NUMBER OF ENERGY EVALUATIONS : 1 ***<br> *******************************************************************************<br><br> -------- Informations at step = 200 ------------<br> Optimization Method = SD<br> Total Energy = -4001.<a href="tel:(586)%20617-4143" value="+15866174143" target="_blank" rel="nofollow">5866174143</a><br> Internal Pressure [bar] = 120.9667651938<br> Real energy change = 0.0000065669<br> Decrease in energy = NO<br> Used time = 215.869<br><br> Convergence check :<br> Max. step size = 0.0000000000<br> Conv. limit for step size = 0.0030000000<br> Convergence in step size = YES<br> RMS step size = 0.0000000000<br> Conv. limit for RMS step = 0.0015000000<br> Convergence in RMS step = YES<br> Max. gradient = 0.0011394985<br> Conv. limit for gradients = 0.0004500000<br> Conv. for gradients = NO<br> RMS gradient = 0.0001518928<br> Conv. limit for RMS grad. = 0.0003000000<br> Conv. in RMS gradients = YES<br> Pressure Deviation [bar] = 20.9667651938<br> Pressure Tolerance [bar] = 100.0000000000<br> Conv. for PRESSURE = YES<br> ---------------------------------------------------<br><br> *** MAXIMUM NUMBER OF OPTIMIZATION STEPS REACHED ***<br> *** EXITING GEOMETRY OPTIMIZATION ***<br></b></div><div><br></div><div>This occurs in all cases where I am taking a metal organic framework, but the optimization is complete in case of small molecules and is fine.</div><div><br></div><div>I have also attached input and xyz file below</div><div><br></div><div>Can anyone suggest me a possible suggestion for the COMPLETE GEOEMTRY OPTIMIZATION.</div><div>Any help will be highly appreciated. </div><div>Thanks and Regards</div><div>Kusum (INDIA).</div></blockquote></div>
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