Re: CosmoMC: seg fault for action=2
Posted: September 26 2019
I also encountered a very similar issue, running with PlanckTTTEEE+lowE and a LCDM+Mnu model. The chains start running for a while, write about 20 points each, and then run into this segfault (I assume it occurs the first time one of the chains explores a region with Mnu<<1 meV). I haven't yet tried the fix Antony suggested but will get around to it soon.
But on a similar note, I also wanted to point out that I had issues with covmats for LCDM+Mnu models. Specifically, in a run with PlanckTTTEEE+lowE and a LCDM+Mnu model, the run starts fine if I use the planck_covmats/base_TTTEEE_lowE_lowl_plikHM.covmat (except that it then crashes due to the segfault discussed in this thread), but if I use planck_covmats/base_mnu_TTTEEE_lowE_lowl_plikHM.covmat (i.e. the same covmat but for the LCDM+Mnu model) the run crashes without even giving the chains the time to write the first points. Anyone encountered anything similar and any ideas as to why it might be happening?
Cheers,
Sunny
But on a similar note, I also wanted to point out that I had issues with covmats for LCDM+Mnu models. Specifically, in a run with PlanckTTTEEE+lowE and a LCDM+Mnu model, the run starts fine if I use the planck_covmats/base_TTTEEE_lowE_lowl_plikHM.covmat (except that it then crashes due to the segfault discussed in this thread), but if I use planck_covmats/base_mnu_TTTEEE_lowE_lowl_plikHM.covmat (i.e. the same covmat but for the LCDM+Mnu model) the run crashes without even giving the chains the time to write the first points. Anyone encountered anything similar and any ideas as to why it might be happening?
Cheers,
Sunny