I am running qc0-mclachlan.par from the ET trunk on Datura. I get this error message during startup:
cactus_sim: /home/ianhin/Cactus/EinsteinToolkit/arrangements/Carpet/CarpetLib/src/region.cc:166: void combine_regions(const std::vector<region_t, std::allocator<region_t>> &, std::vector<region_t, std::allocator<region_t>> &): Assertion `not reg.processors' failed.
I get the same message whether I run on 1 MPI process or 2, and also on another machine. Since qc0-mclachlan is a standard BBH simulation, I assume that a similar error could/does occur for any binary simulation with moving-boxes mesh refinement. Setting priority to Critical as a result.