[CIG-SEISMO] [Fwd: SPECFEM3D_GLOBE_V5.0.0 problem]

[Jeroen Tromp]

Hi Artie:

OK, thanks for letting us know this appears to be a compiler problem.

Jeroen

Arthur Rodgers wrote:
> Hi All -
>
> The problem I was having is related to the compilers on the machine 
> I'm using. I tried to run the same 1-chunk case with version 4.0.4 
> (which had run fine before) using the same compilation (FC=ifort, 
> MPIFC=mpiifort, FFLAGS= -O2) and I got the same errors. In both cases 
> version 4.0.4 and 5.0.0 I decreased the time step by 50% and got the 
> same response. However, both cases crashed with a larger time step (" 
> forward simulation became unstable and blew up in the solid").
>
> This indicates I have a compiler version problem, because I ran 
> version 4.0.4 many, many times and never had to change the time step. 
> Compilers at LLNL (Livermore Computing, LC) are complicated, the 
> executables for ifort or mpifort are actually scripts whose behavior 
> can be changed by invoking different environment variables or options. 
> I will ask the LC helpdesk for assistance with compilation.
>
> Meanwhile, if you discover any problems with one-chunk problems or 
> make any changes, please let me know.
>
> Cheers,
> Arthur