<div dir="ltr">Dear all:<br><br>I am trying to calculate the optic properties of fcc Ni in k-point parallel mode. First I calculate with spin up. It is strnage each time I must run "x optic -up -p" twice and then "x joint -up" (without -p) can work. But when the spin down is selected "x joint -dn" joint error is always reported. I checked the case.symmat* files and found only case.symmatup is not empty while all other case.symmat_xup(dn) and case.symmat1(2)up(dn) files are empty. What is the problem? The opticpara_lapw file is susbstitiuted by the recommended modified file by Prof. Blaha. Thanks!<br><br><br>The results of "x optic -dn -p" are shown as following:<br><br>running OPTIC in parallel mode<br>[1] 18546<br>[2] 18663<br> OPTIC END<br><br>real   0m0.333s<br>user   0m0.076s<br>sys    0m0.072s<br>[1] - Done                         ( $remote $machine[$p] ...<br>[3] 18695<br> OPTIC END<br><br>real   0m0.203s<br>user   0m0.120s<br>sys    0m0.048s<br>[2] - Done                         ( $remote $machine[$p] ...<br>[4] 18757<br> OPTIC END<br><br>real   0m0.225s<br>user   0m0.096s<br>sys    0m0.076s<br>[3] - Done                         ( $remote $machine[$p] ...<br>[5] 18908<br> OPTIC END<br><br>real   0m0.223s<br>user   0m0.112s<br>sys    0m0.052s<br>[4] - Done                         ( $remote $machine[$p] ...<br>[6] 18942<br> OPTIC END<br><br>real   0m0.219s<br>user   0m0.108s<br>sys    0m0.068s<br>[5] - Done                         ( $remote $machine[$p] ...<br>[7] 19034<br> OPTIC END<br><br>real   0m0.220s<br>user   0m0.112s<br>sys    0m0.068s<br>[6] - Done                         ( $remote $machine[$p] ...<br>[8] 19280<br> OPTIC END<br><br>real   0m0.344s<br>user   0m0.128s<br>sys    0m0.056s<br>[7] - Done                         ( $remote $machine[$p] ...<br> OPTIC END<br><br>real   0m0.249s<br>user   0m0.104s<br>sys    0m0.068s<br>[8]   Done                         ( $remote $machine[$p] ...<br>  Summary of opticpara:<br>  a141 user=0 wallclock=82392<br>cat: fccni.mommat_1dn: No such file or directory<br>rm: cannot remove `fccni.mommat_1dn': No such file or directory<br>tail: cannot open `fccni.mommat_2dn' for reading: No such file or directory<br>rm: cannot remove `fccni.mommat_2dn': No such file or directory<br>tail: cannot open `fccni.mommat_3dn' for reading: No such file or directory<br>rm: cannot remove `fccni.mommat_3dn': No such file or directory<br>tail: cannot open `fccni.mommat_4dn' for reading: No such file or directory<br>rm: cannot remove `fccni.mommat_4dn': No such file or directory<br>tail: cannot open `fccni.mommat_5dn' for reading: No such file or directory<br>rm: cannot remove `fccni.mommat_5dn': No such file or directory<br>tail: cannot open `fccni.mommat_6dn' for reading: No such file or directory<br>rm: cannot remove `fccni.mommat_6dn': No such file or directory<br>tail: cannot open `fccni.mommat_7dn' for reading: No such file or directory<br>rm: cannot remove `fccni.mommat_7dn': No such file or directory<br>tail: cannot open `fccni.mommat_8dn' for reading: No such file or directory<br>rm: cannot remove `fccni.mommat_8dn': No such file or directory<br>0.316u 0.744s 0:10.34 10.1%    0+0k 0+3176io 0pf+0w<br><br><br><br><br></div>