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Error on Fluent parallel processing

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Old   February 21, 2011, 12:14
Default Error on Fluent parallel processing
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Dear All,
we're trying to execute ANSYS 12 Fluent on a network of 3 machines under Windows XP 64bit.
Firewall is down on all machines.
But we receive the following error:


Host spawning Node 0 on machine "cad3" (win64).
You can press CTRL+C to stop the startup process!
WARNING: No cached password or password provided.
use '-pass' or '-cache' to provide password
connect() failed: 10061
Cannot establish connection with server.
mpirun: Command sent to service failed. Possible authentication problem.
mpirun: Cannot remote execute ""\\CAD3\C$\PROGRA~1\ANSYSI~1\v120\fluent\fluent12.0 .16\multiport\mpi\win64\hp\bin\mpid.exe"": No such file or directory
mpirun: Unable to contact remote HPMPICCPService or mpid
mpirun: An mpid process may still be running on 192.168.0.20

Can somebody explain a step-by-step procedure on how to set up Fluent for parallel job?

Thanks in advance
Cheers
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Old   February 21, 2011, 18:46
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Patryk Wójtowicz
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Hi, I've similar problem with fluent 13 (latest build), win7 x64
Parallel (local) processing fails (and hangs - I need to terminate cx1300.exe process via task manager). Under WinXP x86 local parallel computing works fine. Already tried to reinstall but problem persists.
Message in fluent TUI says:

mpid: PATH=C:\PROGRA~1\ANSYS Inc\v130\fluent\fluent13.0.0\multiport\mpi\win64\h p\bin;C:\PROGRA~1\ANSYS Inc\v130\fluent\ntbin\win64;C:\PROGRA~1\ANSYS;C:\P ROGRA~1\ANSYS Inc\v130\fluent\fluent13.0.0\multiport\mpi_wrapper \win64\hp
mpid: PWD=C:\PROGRA~1\ANSYS Inc\v130\fluent
mpid: CreateProcess failed: Cannot execute C:\PROGRA~1\ANSYS Inc\v130\fluent\Inc\v130\fluent\fluent13.0.0\multi port\mpi_wrapper\win64\hp
mpirun: Unknown error

So far Ansys support failed to answer my question...
There is one solution in recent documentation - "UDF path conversion problem within win7x64" I've manually assigned path to fluent root folder but this didn't solve the problem.
Any help appreciated! I'm doing a lot of parametric analyses and calculations duration per one DP is a key factor for me...
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Old   February 22, 2011, 03:17
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Hi Patrick,
we've a XP 64bit system, since all recent Windows systems are requiring huge amount of RAM just for the OS to run! So we decided to stay with an older OS but requiring less resources. Of course we've also Linux OpenSUSE 64bit, but first we would like to understand how it can work parallel proc on windows.
Any help would be great.
Thanks
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Old   September 7, 2011, 02:01
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Mohsin Mukhtar
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I am using FLUENT 13.0.
As soon as I run parallel processing with 4 cores, FLUENT gives me the following error:

Host spawning Node 0 on machine "mohsin" (win64).
You can press CTRL+C to stop the process
Error while connecting to host.
Connect on sock (host=Mohsin, port 8678) failed, exhaused all end points
sock error=-1

Could anyone guide me to solve this issue.

Thanks
Mohsin
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Old   September 8, 2011, 12:07
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Ronald A. Lau
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Quote:
Originally Posted by ANDENG View Post

WARNING: No cached password or password provided.
use '-pass' or '-cache' to provide password

Can somebody explain a step-by-step procedure on how to set up Fluent for parallel job?

Thanks in advance
Cheers
Fluent uses SSH for machine to machine communication if the MPI. If you haven't installed an MPI for WinXP 64, then you need to do so.

R.
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Old   September 9, 2011, 10:48
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Mohammad
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hi all,
andeng: did you installed hp mpi on all nodes and copied the fluent directory to all nodes? are all fluent.inc directories shared and have full control user permission? is there a share "temp" folder on all nodes? nodes are in workgroup or domain? does all nodes have exactly the same username and password to login?

mohsin: did you disable firewall on your computer? if you want to use multiple cores on a single node, you'd better use simple parallel mode not distributed parallel.

yours,
mohamad
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Old   January 1, 2012, 07:49
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Hi I am using single node with 4 processes, it used to work but recently after a reformat I have been getting this error:
"mpirun: Cannot evaluate variable value:"

serial runs fine. I am not sure what I previously did to make it work though.
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Old   February 15, 2012, 16:28
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I don't mean to bring up a thread that hasn't had any new posts in over a month, but I found this by googling (first hit) and assume others might as well.

I'm using Fluent from Ansys V13 and had a similar issue where the program would hang while trying to spawn nodes. I had installed Intel MPI (not HP, but it's possibly similar) and to fix the problem, I ran wmpiregister. I'd assume if you installed HP MPI it would be similar. You have to register your username for windows and give it a password (which I believe must match between windows and whatever mpi you're using).

Then, when starting Fluent, under the more options section/parallel settings tab, under MPI types I denoted that I am using Intel MPI instead of default.

Works fine now and no more hanging. Hope that helps anyone who finds this.
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Old   March 17, 2012, 14:58
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Quote:
Originally Posted by Romy View Post
I don't mean to bring up a thread that hasn't had any new posts in over a month, but I found this by googling (first hit) and assume others might as well.

I'm using Fluent from Ansys V13 and had a similar issue where the program would hang while trying to spawn nodes. I had installed Intel MPI (not HP, but it's possibly similar) and to fix the problem, I ran wmpiregister. I'd assume if you installed HP MPI it would be similar. You have to register your username for windows and give it a password (which I believe must match between windows and whatever mpi you're using).

Then, when starting Fluent, under the more options section/parallel settings tab, under MPI types I denoted that I am using Intel MPI instead of default.

Works fine now and no more hanging. Hope that helps anyone who finds this.
Thanks! That worked for me.
Comment:
There is no need to install the HP MPI or Intel MPI! Just specify one (default won't work)
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Old   June 3, 2012, 23:58
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Narendra Gadwal
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Thanks !
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Old   August 9, 2012, 15:06
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George Pichurov
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Quote:
Originally Posted by fluentfreak View Post
Thanks! That worked for me.
Comment:
There is no need to install the HP MPI or Intel MPI! Just specify one (default won't work)
That didn't work, I mean just selecting one of those. Still hangs

I am really getting mad on Ansys for routinely spoiling every effort for productivity on my side. Could someone pose detailed instructions please as to how to make that thing work. INtel MPI says it will not run jobs with the password provided?!! I don't want to use password at all, all I want is to work

Last edited by jorkolino; August 9, 2012 at 15:39.
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Old   August 9, 2012, 15:11
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Quote:
Originally Posted by jorkolino View Post
That didn't work, I mean just selecting one of those. Still hangs
Make sure your firewall is not blocking fluent.....maybe that's the case
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Old   August 9, 2012, 16:18
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Quote:
Originally Posted by fluentfreak View Post
Make sure your firewall is not blocking fluent.....maybe that's the case
Since I know what pest MS Windows can be, I not only disable the firewall, but also make sure I disable the firewall process that starts by default each time computeer starts, regardless wether firewall is disabled (right-click computer, manage, dig down to services. )

I actually made it work after installing Intel MPI, but I have to have a not blank windows password. Is this the case with all of you here, has anyone managed to start parallel run without having a windows password, or supplying its empty windows password? Regards

Fluentfreak, if your nick correctly suggests, could you share your experience of successfully compiling with Fluent (not Ansys/FLuent, but Fluent 6.3 for example) under Windows 7? I resent Ansys and the way they wasted Fluent with eminent crashes even during runs, so I tried hard to setup a successful compiler for FLuent under win7, but I have no success. FLuent itself runs well, but no compiler on earth seems to work with it under Win7. And I don't mean the issue of finding and setting up environmental variables, I somehow manage do that, but either dll errors or other issues UDF giving warning, although used stdio.h header file. I'll be happy to learn someone managed do that.

Last edited by jorkolino; August 9, 2012 at 16:40.
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