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-   -   Exiting the rank during MPI, why? (http://www.cfd-online.com/Forums/ansys/97188-exiting-rank-during-mpi-why.html)

emreg February 10, 2012 19:20

Exiting the rank during MPI, why?
 
Hi,

During fluent process, it suddenly exits, i dont know why, could you please help me?



MPI Application rank 2 exited before MPI_Finalize() with status -1073741819
999999 (..\src\mpsystem.c@1149): mpt_read: failed: errno = 10054
999999: mpt_read: error: read failed trying to read 4 bytes: Invalid argument
The Parallel FLUENT process could not be started.

emreg February 14, 2012 03:22

is there anyone who knows a proper website to download HP-MPI ?

Far February 14, 2012 12:08

This is due to network card. This happen when network card is disconnected from the main LAN even for few moments.

emreg February 14, 2012 14:31

thanks...
but i dont use PC clusters and even a network card.
i have 4 processors in a single machine so i make paralel them with MPI .

Far February 14, 2012 15:35

You must have network card in your system otherwise Fluent wont install. Yeah I am also talking about the single machine with no. of processors. I have observed it for long time that whenever there is disconnection of my LAN card from main network, parallel Fluent stops to work. Two checks

1. Run parallel Fluent and remove network cable from your system.
2. Remove the Network cable and then start Fluent parallel. After this even inserting cable and again removing it does not affect the Fluent.

emreg February 17, 2012 02:19

- i formatted the PC however the problem still continues.
- i dont think that it is related with ethernet card because internet and network connection is working without any simultaneous broken communication

emreg February 18, 2012 13:55

Yes, it is solved !

The problem is that RAM couldnt correspond during importing mesh into fluent.

If RAM is not succesful to perform the instant process, MPI determines to finalize reading mesh or any process in Fluent.

I tried two single 4 GB RAM separately and determined that RAM is not working....

Far February 18, 2012 16:13

Total no of nodes are ?

emreg February 18, 2012 16:16

5 million ----> 4+4 GB RAM

however one of the RAM card is defected.
So it doesnt give response while reading mesh ...

was awful experience :(

Far February 18, 2012 16:21

Rule of thumb, according to my experience, for Fluent 6.3 is:

1.2-1.4 million nodes with density based solver >>>>>>>>> 4 GB RAM

PS: I have no idea about Fluent 13 & 14, may be they have improved it

ChenZhan April 19, 2012 04:09

Quote:

Originally Posted by emreg (Post 343874)
Hi,

During fluent process, it suddenly exits, i dont know why, could you please help me?



MPI Application rank 2 exited before MPI_Finalize() with status -1073741819
999999 (..\src\mpsystem.c@1149): mpt_read: failed: errno = 10054
999999: mpt_read: error: read failed trying to read 4 bytes: Invalid argument
The Parallel FLUENT process could not be started.

:confused:
Dear emrg:
On the line, i find the same question with you.you say it was caused by the RAM,but can you tell me how do you solve it detailly?At the present, this make me feel so helpless.This is the prompt at the end of the
parallel computation:
/define/models/viscous/near-wall-treatment>
999999 (..\src\mpsystem.c@1149): mpt_read: failed: errno = 10054

999999: mpt_read: error: read failed trying to read 24 bytes: No such file or directory
MPI Application rank 0 exited before MPI_Finalize() with status -1073741819
The Parallel FLUENT process could not be started
.
My computer is windows7 64bit system,and the RAM is 48G,double CPU.
Any help will be appreciated.This is my email:chenzhana@163.com
,please help me.Thank you my friends.

fluentfreak October 28, 2012 12:44

This error can happen for several different reasons.

I'm starting to think it's the mpi just reporting there is something wrong...

From my case (when I got this problem):
First make sure your case works perfectly in the single thread (serial) fluent. Then save the case and data (which has marched a few iterations or (timesteps if unsteady). Then open the parallel fluent and continue running the case.

just my $0.02 ...

rayolau November 8, 2012 11:17

Hi everyone! I hope that I can help me. I write a udf for my model and interpreted without problems, but during fluent process appears this:

iter continuity x-velocity y-velocity k epsilon vf-phase-2 time/iter

999999 (..\src\mpsystem.c@1173): mpt_read: failed: errno = 10054

999999: mpt_read: error: read failed trying to read 8 bytes: No such file or directory
MPI Application rank 0 exited before MPI_Finalize() with status -1073741819
The Parallel FLUENT process could not be started.

Whats happens?

Thanks in advance!

marcomelo20 June 8, 2013 12:26

Hi Emerg, your post was really helpful. I was having the same error and my simulations were crashing. It turned out it was my RAM. I just upgraded to 32 Gb and one of the sticks may be defective as i downgraded to 16 and everythinng is working now.

Also, i requested support to ANSYS and they informed me, this error comes when there is a lost of license during the simulation.

Cheers.


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