## Error Creating .minimum files using CosmoMC Action = 2

Use of Cobaya. camb, CLASS, cosmomc, compilers, etc.
Josh Kable
Posts: 6
Joined: March 21 2018
Affiliation: YITP Stony Brook University

### Error Creating .minimum files using CosmoMC Action = 2

I am attempting to run a minimization using CosmoMC action = 2. From the .log file, I can see that the minimization got to a point where it had found a minimum. The .log file lists the best-fit parameters and a $\chi^2$ breakdown, for each of the likelihoods included, for each walker. However, CosmoMC does not produce a .minimum file. The final lines of the .log file say:

Best-fit results:
Error creating file :
MpiStop: 5
Abort(-44192) on node 5 (rank 5 in comm 0): application called MPI_Abort(MPI_COMM_WORLD, -44192) - process 5

I have attempted to rerun the minimization code, and I have checked to make sure that I am telling CosmoMC to output the file in an appropriate directory and that I am not overwriting any existing files. With this problem, I have two questions:

1) Is there a way to fix this problem so that the .minimum files are created?

2) Can I just use the best-fit parameters that are outputted into the .log file?

Antony Lewis
Posts: 1872
Joined: September 23 2004
Affiliation: University of Sussex
Contact:

### Re: Error Creating .minimum files using CosmoMC Action = 2

Sounds weird, disk full or permission issue? The log file probably does have most of the information you need.

Josh Kable
Posts: 6
Joined: March 21 2018
Affiliation: YITP Stony Brook University

### Re: Error Creating .minimum files using CosmoMC Action = 2

Thanks! I will look into these options, and in the mean time, I will just use the results in the .log files