FDSim

Hi everyone,

I perfectly ran the CAN4 model on a 120 cores Cluster, but then I tried to change the number of receivers at surface (first to just 2, and then to 200) and the following error came out:
"Fatal error in PMPI_Bcast: Invalid buffer pointer, error stack:
PMPI_Bcast(2656)........: MPI_Bcast(buf=0x753dd0, count=20, MPI_CHARACTER, root=0, MPI_COMM_WORLD) failed
MPIR_Bcast_impl(1806)...: fail failed
MPIR_Bcast(1834)........: fail failed
I_MPIR_Bcast_intra(2062): Failure during collective
MPIR_Bcast_intra(1672)..: Failure during collective"
I've searched in the internet but I haven't found a suitable solution. Hope some of you can help me. Thank you.

Regards,
Alonso.

Dear Alonso,

my impression is that your error comes from the problem in input file .INM.

Probably there is a problem with one of variables MO_FILE_NAME, JMH_FILE_NAME, Q_FILE_NAME, JMHF_FILE_NAME.
Please check this. There could be also problem in input file .MD.

The error you got
"Fatal error in PMPI_Bcast: Invalid buffer pointer, error stack:
PMPI_Bcast(2656)........: MPI_Bcast(buf=0x753dd0, count=20, MPI_CHARACTER, root=0, MPI_COMM_WORLD) failed
could appear only in the file read_open.F90 at lines 253-256. And they are connected with variables containing the names of input files.

Regards,
Jozef

Dear Jozef,

Thank you for quick response. I've checked those files but it seems that there's nothing wrong. In fact, i've used the same input files that comes with the CAN4 example, but changing only the MR parameter in the .IN file (from 326 to 200 and 2), and of course changing the RECEIVERS.DAT file too. Is there anything else I need to modify, maybe?

Regards,
Alonso.

Dear Alonso,

I have no other idea. Double check the RECEIVERS.DAT file. If you do not find the problem, please, send me (attach to your comment) your changed input files. I will try to find problem.

Regards,
Jozef

Dear Jozef,

Sorry for the delay in my response. I finally started to simulate other basic models and the error didn't come out again. I couldn't figure out what was the problem. Thank you once more for your help.

I have another question/petition. Is there any way to graphically see the grid created by the FDMod3D code?

Best regards,
Alonso.