Yeah, just wanted to make sure you were seeing the same mpiexec in both cases. 
There shouldn't be any issue with providing the complete path, though I can 
take a look


On Sep 17, 2014, at 4:29 PM, Nico Schlömer <nico.schloe...@gmail.com> wrote:

>> You should check that your path would also hit /usr/bin/mpiexec and not some 
>> other version of it
> 
> ```
> $ which mpiexec
> /usr/bin/mpiexec
> ```
> Is this what you mean?
> 
> –Nico
> 
> On Thu, Sep 18, 2014 at 1:04 AM, Ralph Castain <r...@open-mpi.org> wrote:
>> You should check that your path would also hit /usr/bin/mpiexec and not some 
>> other version of it
>> 
>> On Sep 17, 2014, at 4:01 PM, Nico Schlömer <nico.schloe...@gmail.com> wrote:
>> 
>>> Hi all!
>>> 
>>> Today, I observed a really funky behavior of my stock
>>> ```
>>> $ mpiexec --version
>>> mpiexec (OpenRTE) 1.6.5
>>> 
>>> Report bugs to http://www.open-mpi.org/community/help/
>>> ```
>>> on Ubuntu 14.04. When running one of my test codes with
>>> ```
>>> $ mpiexec -n 2 ioTest
>>> [...]
>>> ```
>>> all is fine. If instead I use the full path of mpiexec, I get a
>>> different behavior
>>> ```
>>> $ /usr/bin/mpiexec -n 2 ioTest
>>> [...]
>>> (exception thrown)
>>> ```
>>> I was puzzled, so skimmed the manpage and found that the `--prefix`
>>> option might have something to do with it. I played around and got
>>> ```
>>> $ /usr/bin/mpiexec --prefix . -n 2 ioTest
>>> [fuji:21003] *** Process received signal ***
>>> [fuji:21003] Signal: Segmentation fault (11)
>>> [fuji:21003] Signal code: Address not mapped (1)
>>> [fuji:21003] Failing at address: 0x1000000dd
>>> [fuji:21003] [ 0] /lib/x86_64-linux-gnu/libpthread.so.0(+0x10340)
>>> [0x7f12e4069340]
>>> [fuji:21003] [ 1] /lib/x86_64-linux-gnu/libc.so.6(_IO_vfprintf+0x1d13)
>>> [0x7f12e3cde8f3]
>>> [fuji:21003] [ 2]
>>> /lib/x86_64-linux-gnu/libc.so.6(__vasprintf_chk+0xb5) [0x7f12e3d9e035]
>>> [fuji:21003] [ 3]
>>> /usr/lib/libopen-rte.so.4(opal_show_help_vstring+0x343)
>>> [0x7f12e43043e3]
>>> [fuji:21003] [ 4] /usr/lib/libopen-rte.so.4(orte_show_help+0xaf)
>>> [0x7f12e42a5faf]
>>> [fuji:21003] [ 5] /usr/bin/mpiexec() [0x403ab3]
>>> [fuji:21003] [ 6] /usr/bin/mpiexec() [0x40347d]
>>> [fuji:21003] [ 7]
>>> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5)
>>> [0x7f12e3cb4ec5]
>>> [fuji:21003] [ 8] /usr/bin/mpiexec() [0x403399]
>>> [fuji:21003] *** End of error message ***
>>> Segmentation fault (core dumped)
>>> ```
>>> That's tough!
>>> 
>>> Should I try to reproduce this with a more recent version? Any idea
>>> what the reason for the different behavior of `mpiexec` and
>>> `/usr/bin/mpiexec` might be?
>>> 
>>> Cheers,
>>> Nico
>>> _______________________________________________
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>>> http://www.open-mpi.org/community/lists/users/2014/09/25338.php
>> 
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