papi_clockres: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/papi_clockres - from package: papi

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/papi_clockres - from package: papi-tools

You may install the required package with command apt-get install {package}
Error in other languages:
papi_clockres: bevel nie gevind nie
papi_clockres: comandă negăsită
papi_clockres: comando não encontrado
papi_clockres: commande introuvable
papi_clockres: command not found
papi_clockres: käsku ei ole
papi_clockres: không tìm thấy lệnh
papi_clockres: komanda nerasta
papi_clockres: Kommando nicht gefunden.
papi_clockres: kommandot finns inte
papi_clockres: komut yok
papi_clockres: nie znaleziono polecenia
papi_clockres: níor aimsíodh an t-ordú
papi_clockres: no se encontró la orden
papi_clockres: no s'ha trobat l'ordre
papi_clockres: opdracht niet gevonden
papi_clockres: parancs nem található
papi_clockres: perintah tidak ditemukan
papi_clockres: príkaz nenájdený
papi_clockres: příkaz nenalezen
papi_clockres: команда не найдена
papi_clockres: командата не е открита
papi_clockres: 命令找不到
papi_clockres: コマンドが見つかりません