Dear sir/madam

Hello.

I am running Ubuntu 12.0.4 LTS (my computer is dual boot with win XP SP3 and ubuntu). I can swear that I have run the example 'cpi' in the package 'mpich-3.0.4'. but now, see the result of executting

soheil@soheil-desktop:~/mpich-3.0.4$ mpiexec -n 4 ./examples.cpi
[proxy:0:0@soheil-desktop] HYDU_create_process (./utils/launch/launch.c:75): execvp error on file ./examples.cpi (No such file or directory)
[proxy:0:0@soheil-desktop] HYDU_create_process (./utils/launch/launch.c:75): execvp error on file ./examples.cpi (No such file or directory)
[proxy:0:0@soheil-desktop] HYDU_create_process (./utils/launch/launch.c:75): execvp error on file ./examples.cpi (No such file or directory)
[proxy:0:0@soheil-desktop] HYDU_create_process (./utils/launch/launch.c:75): execvp error on file ./examples.cpi (No such file or directory)
===================================================================================
= BAD TERMINATION OF ONE OF YOUR APPLICATION PROCESSES
= EXIT CODE: 255
= CLEANING UP REMAINING PROCESSES
= YOU CAN IGNORE THE BELOW CLEANUP MESSAGES
===================================================================================
soheil@soheil-desktop:~/mpich-3.0.4$

Also, 'whiching' mpicc and mpiexec both return /user/local/bin/mpicc and /user/local/bin/mpiexec, respectively.

I mean I have installed mpich before and sat the PATH variable.

I need mpich on my ubuntu. Please help.