[mpich-discuss] lnk 2019 error, hellow world on windows 7 (64bit), VS2008

[Jayesh Krishna]

Hi,
 There seems to be some problem with the MPICH2 installation. Uninstall MPICH2 and try the steps mentioned in the Section 9.4 (NOT 9.1) of the MPICH2 installer's guide (http://www.mcs.anl.gov/research/projects/mpich2/documentation/index.php?s=docs) to install MPICH2.

(PS: Usually the VS installations have support for building 64-bit applications. I would recommend building 64-bit apps with VS.)

Regards,
Jayesh

----- Original Message -----
From: "Ryan Price" <ryprice00 at gmail.com>
To: "Jayesh Krishna" <jayesh at mcs.anl.gov>
Cc: mpich-discuss at mcs.anl.gov
Sent: Tuesday, May 3, 2011 12:28:51 PM
Subject: Re: [mpich-discuss] lnk 2019 error, hellow world on windows 7 (64bit), VS2008

Thanks for your reply Jayesh. 

I had the 64bit version of MPICH2 installed but do not have the 64bit components enabled in VS. So I decided to try uninstalling the 64bit version of MPICH2 and installed the 32bit version. 

I tried running my helloworld program again and am no longer getting the linker error I was previously :) Unfortunately I know get another error :( 

Error while connecting to host, No connection could be made because the target machine actively refused it. (10061) 
Connect on sock (host= my.host.name , port=8678) failed, exhaused all end points 
Unable to connect to ' my.host.name:8678 ', 
sock error: Error = -1 

Maybe I didn't configure something correctly during setup. I would have thought this was due to the firewall but I did make sure that mpiexec and smpd are not blocked by windows firewall. Maybe I just need to bite the bullet and reinstall VS with 64bit components enabled and reinstall the 64bit version of MPICH2. 


On Mon, May 2, 2011 at 8:19 AM, Jayesh Krishna < jayesh at mcs.anl.gov > wrote: 


Hi, 

# Make sure that you installed the 64-bit version of MPICH2. 
# Make sure that you select the "solution platform" in VS to be "x64" (Usually the default one is "Win32" . There should be a drop-down box on the top of the VS interface that allows you to select the "solution platform" - You might have to select "Configuration Manager" and create a new "Active Solution platform". You might find more help in the VS help docs.) 
# Make sure that the paths specified to MPICH2 libs are correct. 

-Jayesh 




----- Original Message ----- 
From: "Ryan Price" < ryprice00 at gmail.com > 
To: mpich-discuss at mcs.anl.gov 
Sent: Sunday, May 1, 2011 6:08:14 PM 
Subject: [mpich-discuss] lnk 2019 error, hellow world on windows 7 (64bit), VS2008 



Hi, 

I'm just trying to get a mpi hello world program up and running and can't seem to get it to build properly. I'm on windows7 using VS2008. 

I get this error: 
1>myprog.obj : error LNK2019: unresolved external symbol _MPI_Finalize referenced in function _main 
1>myprog.obj : error LNK2019: unresolved external symbol _MPI_Comm_size referenced in function _main 
1>myprog.obj : error LNK2019: unresolved external symbol _MPI_Comm_rank referenced in function _main 
1>myprog.obj : error LNK2019: unresolved external symbol _MPI_Init referenced in function _main 
1>E:\Visual Studio 2008\Projects\myprog\Debug\myprog.exe : fatal error LNK1120: 4 unresolved externals 

I've seen many posts with similar problems but unfortunately I haven't been able to solve the issue on my own. It looks like it's not seeing where my compiled mpi libs are but I have specified the MPICH2 libraries as "Additional dependencies" for the linker (set the path of MPICH2 libraries in "Additional library directories" and added mpi.lib as "Additional dependencies"). I have tried compiling with both VC++ and IntelC++, both of which have the directories for the include files and library files set under tools->options as well. 

Not sure what else to try. Any help is greatly appreciated. 

Thanks, 

Ryan 
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