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There is no domain decomposition for 20 ranks...ERROR
 04:04:41:WU00:FS00:0xa7:Calling: mdrun -s frame18.tpr -o frame18.trr -x frame18.xtc -cpt 15 -nt 28
04:04:41:WU00:FS00:0xa7:Steps: first=9000000 total=500000
04:04:41:WU00:FS00:0xa7:ERROR:
04:04:41:WU00:FS00:0xa7:ERROR:-------------------------------------------------------
04:04:41:WU00:FS00:0xa7:ERROR:Program GROMACS, VERSION 5.0.4-20191026-456f0d636-unknown
04:04:41:WU00:FS00:0xa7:ERROR:Source code file: /host/debian-stable-64bit-core-a7-avx-release/gromacs-core/build/gromacs/src/gromacs/mdlib/domdec.c, line: 6902
04:04:41:WU00:FS00:0xa7:ERROR:
04:04:41:WU00:FS00:0xa7:ERROR:Fatal error:
04:04:41:WU00:FS00:0xa7:ERROR:There is no domain decomposition for 20 ranks that is compatible with the given box and a minimum cell size of 1.37225 nm
04:04:41:WU00:FS00:0xa7:ERROR:Change the number of ranks or mdrun option -rcon or -dds or your LINCS settings
04:04:41:WU00:FS00:0xa7:ERROR:Look in the log file for details on the domain decomposition
04:04:41:WU00:FS00:0xa7:ERROR:For more information and tips for troubleshooting, please check the GROMACS
04:04:41:WU00:FS00:0xa7:ERROR:website at http://www.gromacs.org/Documentation/Errors
04:04:41:WU00:FS00:0xa7:ERROR:-------------------------------------------------------
04:04:46:WU00:FS00:0xa7:WARNING:Unexpected exit() call
04:04:46:WU00:FS00:0xa7:WARNING:Unexpected exit from science code 
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