pprof2calltree: command not found

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/pprof2calltree - from package: kdesdk

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

On Debian possible default full paths are:

/usr/bin/pprof2calltree - from package: kcachegrind-converters

You may install the required package with command apt-get install {package}

Error in other languages:
pprof2calltree: bevel nie gevind nie
pprof2calltree: comandă negăsită
pprof2calltree: comando não encontrado
pprof2calltree: commande introuvable
pprof2calltree: command not found
pprof2calltree: käsku ei ole
pprof2calltree: không tìm thấy lệnh
pprof2calltree: komanda nerasta
pprof2calltree: Kommando nicht gefunden.
pprof2calltree: kommandot finns inte
pprof2calltree: komut yok
pprof2calltree: nie znaleziono polecenia
pprof2calltree: níor aimsíodh an t-ordú
pprof2calltree: no se encontró la orden
pprof2calltree: no s'ha trobat l'ordre
pprof2calltree: opdracht niet gevonden
pprof2calltree: parancs nem található
pprof2calltree: perintah tidak ditemukan
pprof2calltree: príkaz nenájdený
pprof2calltree: příkaz nenalezen
pprof2calltree: команда не найдена
pprof2calltree: командата не е открита
pprof2calltree: 命令找不到
pprof2calltree: コマンドが見つかりません