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uuv2010榮譽(yù)版主 (職業(yè)作家)
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[資源]
【活動(dòng)and資源】vasp的警告、報(bào)錯(cuò)信息及解決辦法 -- 歡迎大家補(bǔ)充
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在使用vasp的過程中難免會(huì)出現(xiàn)一些警告、報(bào)錯(cuò)信息,現(xiàn)在將這樣的信息和一些解決辦法列出來。歡迎大家一起討論,把解決問題的辦法記錄下來,讓我們?cè)谝黄鸾鉀Q問題中前行。歡迎補(bǔ)充~討論~ 1. warning: the distance between some ions is very small 一種可能的錯(cuò)誤是因?yàn)椋涸趐oscat中的坐標(biāo)類型(Direct 或者 car)沒有頂格寫(也就是說開頭空格),如果你是笛卡爾坐標(biāo)的話,它會(huì)識(shí)別為direct坐標(biāo),從而出現(xiàn)這樣的警告。 2. WARNING: CHECK: NIOND is too small dyna.F中的NIOND 默認(rèn)值是 256,如果體系中的原子數(shù)大于256時(shí)將出現(xiàn)這個(gè)警告信息。所以解決辦法就是:將 NIOND 的值改成一個(gè)大于你計(jì)算體系的原子數(shù),然后重新編譯一下。 3. ERROR: there must be 1 or 3 items on line 2 of POSCAR FORTRAN STOP 造成這個(gè)錯(cuò)誤的原因是上傳POSCAR文件的時(shí)候是windows的格式,傳到unix系統(tǒng)下造成回車符不對(duì)。 最簡(jiǎn)單的解決方法為:試著在unix下直接寫一個(gè);蛘遜os2unix filename 4. VASP計(jì)算出現(xiàn)Segmentation Fault而終止運(yùn)算 在makefile中 FFLAGS 后面添加-heap-arrays,例如: FFLAGS = -FR -lowercase -assume byterecl -heap-arrays [ Last edited by ben_ladeng on 2011-6-26 at 00:34 ] |
第一性原理 | VASP | 第一性原理計(jì)算經(jīng)驗(yàn) | 零點(diǎn)能 |
科研工具 | 科研 | vasp 錯(cuò)誤解決 |
榮譽(yù)版主 (職業(yè)作家)
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5. WARNING: aliasing errors must be expected set NGX to 154 to avoid them WARNING: aliasing errors must be expected set NGY to 158 to avoid them WARNING: aliasing errors must be expected set NGZ to 126 to avoid them aliasing errors are usually negligible using standard VASP settings and one can safely disregard these warnings 當(dāng)設(shè)置PREC=LOW,NORMAL時(shí)會(huì)出現(xiàn)這樣的警告信息,當(dāng)PREC=high和accurate時(shí)就沒有了,或者直接將NGX,NGY,NGZ設(shè)置成警告信息中給出的數(shù)值即可。 |
榮譽(yù)版主 (職業(yè)作家)
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6. DVICE TO THIS USER RUNNING 'VASP/VAMP' (HEAR YOUR MASTER'S VOICE ...): | | | | You enforced a specific xc-type in the INCAR file, | | a different type was found on the POTCAR file | | I HOPE YOU KNOW, WHAT YOU ARE DOING 正確的做法是將GGA這個(gè)參數(shù)和POTCAR中得xc的類型保持一致。 這是交換關(guān)聯(lián)泛函不匹配時(shí)的報(bào)錯(cuò)信息及解決辦法的帖子的鏈接。 http://www.gaoyang168.com/bbs/viewthread.php?tid=3382412&fpage=1 [ Last edited by uuv2010 on 2012-3-17 at 15:32 ] |
榮譽(yù)版主 (職業(yè)作家)
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7 WAVECAR not read WARNING: number of atoms are different on CHGCAR file ERROR: charge density could not be read from file CHGCAR for ICHARG>10 這個(gè)時(shí)候明明已經(jīng)有了CHGCAR,還是出現(xiàn)這個(gè)報(bào)錯(cuò),原因在于CHGCAR中第一行是空行,只需要將這行加上字符就可以了;蛘咴诓幻靼譏NCAR中參數(shù)的情況下,就不需要設(shè)置,只設(shè)置自己理解的參數(shù)。可以減少錯(cuò)誤的發(fā)生。這個(gè)錯(cuò)誤的原因在于INCAR中SYSTEM這個(gè)關(guān)鍵字后面沒有寫內(nèi)容。 |
榮譽(yù)版主 (知名作家)
榮譽(yù)版主 (職業(yè)作家)
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8 如果計(jì)算的體系的單胞很小,即三個(gè)晶格常數(shù)較小的時(shí)候,會(huì)出現(xiàn)如下報(bào)錯(cuò): ---------------------------------------------------------------------------- | | | ADVICE TO THIS USER RUNNING 'VASP/VAMP' (HEAR YOUR MASTER'S VOICE ...): | | | | You have a (more or less) 'small supercell' and for smaller cells | | it is recommended to use the reciprocal-space projection scheme! | | The real space optimization is not efficient for small cells and it | | is also less accurate ... | | Therefore set LREAL=.FALSE. in the INCAR file | | | ----------------------------------------------------------------------------- 解決辦法: 在INCAR中添加: LREAL=.FALSE. 討論這個(gè)問題的帖子鏈接為 http://www.gaoyang168.com/bbs/viewthread.php?tid=3607248&fpage=1 [ Last edited by uuv2010 on 2011-9-17 at 15:37 ] |
榮譽(yù)版主 (職業(yè)作家)
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9 當(dāng)設(shè)置ICHCARG=11或者其它大于10而當(dāng)前計(jì)算的文件夾中沒有把CHGCAR文件的時(shí)候,會(huì)出現(xiàn)如下報(bào)錯(cuò): ERROR: charge density could not be read from file CHGCAR for ICHARG>10 解決辦法: 1.如果當(dāng)前的計(jì)算的確是需要應(yīng)用已經(jīng)計(jì)算好的電荷密度的時(shí)候,那么將CHGCAR(一般式靜態(tài)計(jì)算后得到的)拷到當(dāng)前計(jì)算的文件夾中 2.如果當(dāng)前的計(jì)算不需要用已經(jīng)計(jì)算好的電荷密度,那么將ICHGCARG改為相應(yīng)的值,具體各個(gè)數(shù)值的意義見如下鏈接: http://cms.mpi.univie.ac.at/vasp/vasp/ICHARG_tag.html |
鐵桿木蟲 (正式寫手)
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WARNING: dimensions on CHGCAR file are different ERROR: charge density could not be read from file CHGCAR for ICHARG>10 如果確定把自洽計(jì)算后的CHGCAR拷貝到當(dāng)前目錄下,可考慮修改當(dāng)前目錄的INCAR文件中NGXF,NGYF,NGZF(與自洽計(jì)算OUTCAR的輸出值一致) 具體可見: http://cms.mpi.univie.ac.at/vasp-forum/forum_viewtopic.php?4.6816 |
榮譽(yù)版主 (職業(yè)作家)
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10 | Your generating k-point grid is not commensurate to the symmetry | | of the lattice. This can cause slow convergence with respect | | to k-points for HF type calculations | | suggested SOLUTIONS: | | ) if not already the case, use automatic k-point generation | | ) shift your grid to Gamma (G) (e.g. required for hex or fcc lattice) | 這樣的設(shè)置對(duì)于HF類型的計(jì)算是正確的,而對(duì)于其他的比如純DFT的計(jì)算這樣的設(shè)置是有問題的。 討論貼子鏈接: http://www.gaoyang168.com/bbs/viewthread.php?tid=3387913&page=3 |
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Your highest band is occupied at some k-points! Unless you are | | performing a calculation for an insulator or semiconductor, without | | unoccupied bands, you have included TOO FEW BANDS!! Please increase | | the parameter NBANDS in file INCAR to ensure that the highest band | | is unoccupied at all k-points. It is always recommended to | | include a few unoccupied bands to accelerate the convergence of | | molecular dynamics runs (even for insulators or semiconductors). | | Because the presence of unoccupied bands improves wavefunction | | prediction, and helps to suppress 'band-crossings.' 算結(jié)構(gòu)優(yōu)化的時(shí)候出現(xiàn)的,怎么處理? |
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