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Sob老师和各位老师好,我在做氧化铝表面能量最小化时遇到报错:Fatal error: There is no domain decomposition for 1 ranks that is compatible with the given box and a minimum cell size of 4.23552 nm。
详细过程及输入文件如下,麻烦各位老师看看是什么原因。
1、用MS建立Al2O3的羟基化表面模型,导出pdb文件,利用Sobtop生成itp,top和gro文件。使用CLAYFF力场。
2、做em,mdrun时报错。mdp文件如下。
- gmx grompp -f em.mdp -c 2_2020.gro -p 2_2020.top -o em.tpr -maxwarn 1
复制代码 在生成.tpr文件时,gmx给出警告:体系含有净电荷。我用-maxwarn 1 将其忽略了。
在这一步出现报错:Fatal error:
There is no domain decomposition for 1 ranks that is compatible with the given
box and a minimum cell size of 4.23552 nm
Change the number of ranks or mdrun option -rdd or -dds
Look in the log file for details on the domain decomposition
加上 -ntmpi 1 后仍是以上报错(毕竟ranks是1,也不能再小了)。查看log,注意到其中一段:When checking whether update groups are usable:
No constraints or virtual sites are in use, so it is best not to use update groups
Initializing Domain Decomposition on 1 ranks
NOTE: disabling dynamic load balancing as it is only supported with dynamics, not with integrator 'cg'.
Dynamic load balancing: off
Minimum cell size due to atom displacement: 0.050 nm
Initial maximum distances in bonded interactions:
two-body bonded interactions: 3.850 nm, Exclusion, atoms 891 893
multi-body bonded interactions: 3.850 nm, Angle, atoms 891 893
Minimum cell size due to bonded interactions: 4.236 nm
Using 0 separate PME ranks because: there are too few total ranks for efficient splitting
Optimizing the DD grid for 1 cells with a minimum initial size of 4.236 nm
The maximum allowed number of cells is: X 0 Y 0 Z 0
-------------------------------------------------------
Program: gmx mdrun, version 2022.3
Source file: src/gromacs/domdec/domdec.cpp (line 2239)
Fatal error:
There is no domain decomposition for 1 ranks that is compatible with the given
box and a minimum cell size of 4.23552 nm
Change the number of ranks or mdrun option -rdd or -dds
Look in the log file for details on the domain decomposition
猜测原因出在红字显示的部分,891、893原子之间,或者分别的成键出现了什么问题。
但是返回去查看itp文件,这两个原子都是氧化铝体相的Al原子,成键(与6个O原子成键)也没有问题。itp文件(4.4MB)不知道为什么上传不了;
- 891 Al_bulk 1 MOL AL 891 1.57500000 26.981539
- 893 Al_bulk 1 MOL AL 893 1.57500000 26.981539
复制代码 bonds字段我也检查了,看起来都是正常的。
MS里对照坐标找到这两个Al原子,如下图黄色高亮显示,看起来好像也没有什么明显的问题:
所以出现错误可能是什么原因呢?谢谢Sob老师和各位前辈!
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