Note on GCMC and dump sorted by atom id

Thank you very much for your support, this is what I found
out (regarding the relatively simple toy-simulation in the

All Tests done w/LAMMPS 2018.08.02

* Simulation without writing sorted (id) dump files will run
   perfectly and forever,
* Simulation w/standard sorting at dumps will crash reproducibly
   at step 00369000 during writing the dump file (4h on my desktop
* Simulation with LAMMPS compiled w/-DLMP_QSORT and sorting at dumps
   will NOT crash at this said point (and is still running).


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