I have been using mpiexec.hydra for launching non-MPI applications that communicate via ZeroMQ. I use the configfile parameter, one line per application. Here’s an example: -n 1 -env FNCS_BROKER tcp://*:5570 fncs_broker 10 -n 1 -wdir R1_12_47_1_feeder_6 gridlabd R1_12_47_1_feeder_6.glm -n 1 -wdir R1_12_47_1_feeder_7 gridlabd R1_12_47_1_feeder_7.glm -n 1 -wdir R1_12_47_2_feeder_0 gridlabd R1_12_47_2_feeder_0.glm -n 1 -wdir R1_12_47_2_feeder_1 gridlabd R1_12_47_2_feeder_1.glm -n 1 -wdir R1_12_47_2_feeder_2 gridlabd R1_12_47_2_feeder_2.glm -n 1 -wdir R1_12_47_3_feeder_4 gridlabd R1_12_47_3_feeder_4.glm -n 1 -wdir R1_12_47_3_feeder_5 gridlabd R1_12_47_3_feeder_5.glm -n 1 -wdir R1_12_47_4_feeder_8 gridlabd R1_12_47_4_feeder_8.glm -n 1 -wdir R1_25_00_1_feeder_3 gridlabd R1_25_00_1_feeder_3.glm -n 1 -wdir matpower ./start_MATPOWER case9.m real_power_demand.txt 18000 3600 This worked well for this smaller case. I then tried a case with 15002 lines in my configfile, but I got a backtrace from mpiexec *** glibc detected *** mpiexec: free(): invalid pointer: 0x0000000000736b10 *** I’m guessing there is some size limit for the configfile? Can anyone confirm and suggest a patch? Jeff _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss