Hi Ian

I'am running on VirtualBox set whit 2 Processors and 8GB RAM

When i try with this submit command

create-submit mybbh --parfile par/BBHLowRes.par --num-threads=1 --procs=2

I get following message in .err file

WARNING level 0 from host kpc-VirtualBox process 0
  while executing schedule bin (none), routine (no thorn)::(no routine)
  in thorn Carpet, file /home/kuangtly/programming/ET/forfun/Cactus/arrangements/Carpet/Carpet/src/SetupGH.cc:153:
  -> The environment variable CACTUS_NUM_PROCS is set to 2, but there are 1 MPI processes. This may indicate a severe problem with the MPI startup mechanism.
cactus_sim: /home/kuangtly/programming/ET/forfun/Cactus/arrangements/Carpet/Carpet/src/helpers.cc:275: int Carpet::Abort(const cGH*, int): Assertion `0' failed.
Rank 0 with PID 15985 received signal 6
Writing backtrace to BBHLowRes/backtrace.0.txt
Aborted (core dumped)


i have change these setting in .ini file
ppn =2
max-num-threads =2
num-threads =2



On Fri, Dec 23, 2016 at 6:28 PM, Ian Hinder <ian.hinder@aei.mpg.de> wrote:

On 23 Dec 2016, at 10:52, Cory Chu <cory.yk.chu@gmail.com> wrote:

Erik

Should I simply change the .ini file in simfactory/mdb/machines
with
ppn = 2
max-num-threads = 2
num-threads = 2

and adding --procs = 2 on running command ?

sorry i just can not find a detail documentation on this part
after i change the above setting
the problem did not solved 

Hi Cory,

Can you give the command line you are using to submit the simulation?  You need to ensure that the number of MPI processes you use is larger.  You could do this by running fewer threads per process, or if you are already running one thread per process, by increasing the number of processes by increasing the number of threads.  That might mean reconfiguring the machine definition to allow more cores to be used than you actually have.  What machine is it; i.e. how many processors and cores do you have?