Dear Ali,<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div dir="ltr"><br><div style="text-align:left"><font size="3"><font face="'lucida grande', tahoma, verdana, arial, sans-serif"><span style="line-height:14px">During convergence, the error was : </span></font>Not enough space allocated for radial FFT: try restarting with a larger cell_factor</font></div>
<div style="text-align:left"><font size="3"></font></div><font size="3">.</font><div style="text-align:left"><font size="3">So my question is : What is the real problem in my input ?</font></div></div></div></blockquote><div>
<br>the real problem in your input is that the initial lattice parameters are way too far from the equilibrium.<br>Usually, to use the experimental data as the initial guess for relax/vc-relax is quite a good idea, and leads<br>
to no troubles. <br></div></div><br>-- <br>Best regards, Max Popov<br>Ph.D. student<br>Materials center Leoben (MCL), Leoben, Austria.<br>