Profilers (nvprof, pgprof) not working

I have an issue, I would like to use a profiler to see many things that I can optimize (coalesced access, kernel times, etc…) but when I enter the pgprof or even the nvprof command, I get the following error :

pgprof: command not found

nvprof: command not found

I check my files, and pgprof seems to be installed in the good repertory (in my case : linux86-64/16.10/bin).
How can I use a profiler that work ? Thanks.[/code]

setenv PGI /usr/pgi
set path=($PGI/linux86-64/16.10/bin $PGI/linux86-64/2016/cuda/7.5-pgprof/bin $PGI/linux86-64/2016/mpi/openmpi/bin $path)

or in bash

export PGI=/usr/pgi
export PATH=$PGI/linux86-64/16.10/bin:$PGI/linux86-64/2016/cuda/7.5-pgprof/bin:$PGI/linux86-64/2016/mpi/openmpi/bin:$PATH

% which pgprof
% which nvprof

Note: I am not sure nvprof is identical to the CUDA version that
comes with the CUDA driver/tools. Depending on what you are doing,
one may be preferable.

It works for pgprof, thanks !