mesa-users] weird seg.fault

[Tuguldur Sukhbold]

Hi there,

I have been using MESA for the past 3 months with no problems at all. But
since yesterday I start seeing a weird segmentation fault error. This error
comes in suddenly not allowing me to run any models, and it disappear as
sudden as it appeared. I don't think the problem is with the code, but I was
just wondering if anybody has any ideas of why its happening?

The error:

tuguldur at tuxedo:~/data1/mesa/star/s2bx3m2$ ./rn
Revision: 2653
Wed Oct 20 01:13:09 MST 2010


 The terminal output contains the following information

      'step' is the number of steps since the start of the run,
      'lg_dt_yr' is log10 timestep in years,
      'age_yr' is the simulated years since the start run,
      'lg_Tcntr' is log10 center temperature (K),
      'lg_Dcntr' is log10 center density (g/cm^3),
      'lg_Pcntr' is log10 center pressure (ergs/cm^3),
      'Teff' is the surface temperature (K),
      'lg_R' is log10 surface radius (Rsun),
      'lg_L' is log10 surface luminosity (Lsun),
      'lg_LH' is log10 total PP and CNO hydrogen burning power (Lsun),
      'lg_L3a' is log10 total triple-alpha helium burning power (Lsun),
      'lg_LZ' is log10 total burning power excluding LH and L3a and
photodisintegrations (Lsun),
      'lg_LNuc' is log10 nuclear power excluding photodisintegration (Lsun),
      'lg_LNeu' is log10 total neutrino power (Lsun),
      'lg_Psurf' is log10 surface pressure (gas + radiation),
      'Mass' is the total stellar mass (Msun),
      'lg_Mdot' is log10 magnitude of rate of change of mass (Msun/year),
      'lg_Dsurf' is log10 surface density (g/cm^3),
      'H_rich' is the remaining mass outside of the hydrogen poor core,
      'H_poor' is the core mass where hydrogen abundance is <= 0.10E-03
      'He_poor' is the core mass where helium abundance is <= 0.10E-03
      'H_cntr' is the center H1 mass fraction,
      'He_cntr' is the center He4 mass fraction,
      'C_cntr' is the center C12 mass fraction,
      'N_cntr' is the center N14 mass fraction,
      'O_cntr' is the center O16 mass fraction,
      'Ne_cntr' is the center Ne20 mass fraction,
      'X_avg' is the star average hydrogen mass fraction,
      'Y_avg' is the star average helium mass fraction,
      'Z_avg' is the star average metallicity,
      'gam_cntr' is the center plasma interaction parameter,
      'eta_cntr' is the center electron degeneracy parameter,
      'pts' is the number of grid points in the current model,
      'iters' is the number of newton iterations for the current step,
      'retry' is the number of step retries required during the run,
      'bckup' is the number of step backups required during the run,
      'dt_limit' is an indication of what limited the timestep.

 All this and more are saved in 'LOGS/star.log' during the run.

 create pre-main-sequence model
./rn: line 4:  8924 Segmentation fault      ./star
Wed Oct 20 01:13:11 MST 2010

Again, this happens and goes away without my interference at all. The models
which run without any problems before simply wouldn't run again. Even the
example model of the handbook in "star/test/" doesn't work, giving the same
error.

thanks,
Tuguldur
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