<div dir="ltr"><div><div><div><div><div><div><div><div><div><div>Dear all<br><br></div>I am trying to simulate Cu2ZnSnS4 structure. I have done the initialization and scf run. Now in property calculation i calculated the DOS. However during optical property calculation i am getting error of "Cannot allocate array - overflow on array size calculation".<br></div>I have used K points equal to 1000 for optic calculation. I also have tried with lower no of k points i.e 8, 64 etc. but the problem remained same.<br></div>What i am observing is that Kmin, Kmax in the error is showing 1310722. which i think is not reasonable.<br></div><br></div>For optic calculation i have done<br><br></div>x kgen<br></div>x lapw1<br></div>x lapw2 -fermi<br></div>x optic <br><br></div>after this i am getting this problem<br><div><div><div><div><div><div><div><div><div><div><div><br>[ambeshst@IITJ_HPC kczgs]$ x optic<br> emin,emax,nbvalmax -5.00000000000000 3.00000000000000 9999<br> creating ust<br> kmin,kmax -1310722 -1310722 -1310722 1310722 1310722<br> 1310722<br>forrtl: severe (179): Cannot allocate array - overflow on array size calculation.<br>Image PC Routine Line Source <br>opticc 00000000004E123A Unknown Unknown Unknown<br>opticc 00000000004DFDB5 Unknown Unknown Unknown<br>opticc 0000000000491D26 Unknown Unknown Unknown<br>opticc 0000000000457215 Unknown Unknown Unknown<br>opticc 000000000047AA3A Unknown Unknown Unknown<br>opticc 000000000042617A planew_ 86 planew_tmp.f<br>opticc 00000000004380FC mom_mat_ 588 sph-UP_tmp.f<br>opticc 000000000042064D MAIN__ 453 opmain.f<br>opticc 000000000040337C Unknown Unknown Unknown<br>libc.so.6 000000344221D9C4 Unknown Unknown Unknown<br>opticc 0000000000403289 Unknown Unknown Unknown<br>27.105u 0.040s 0:28.25 96.0% 0+0k 0+0io 17pf+0w<br>error: command /home/IITJHOME/ambeshst/win2k13mpi/opticc optic.def failed<br><br clear="all"></div><div>I have checked the memory issue but it should not be the case since i am simulating the structure on HPC which has very high memory. <br><br><br></div><div>Thanks<br>-- <br><div class="gmail_signature"><div dir="ltr"><b style="background-color:rgb(255,255,255)"><font color="#0000ff">Goutam Kumar Gupta</font></b><div><div><b style="background-color:rgb(255,255,255)"><font color="#0000ff">Mob:8561995547</font></b></div></div></div></div>
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