dprof2calltree: 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/dprof2calltree - from package: kdesdk

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

On Debian possible default full paths are:

/usr/bin/dprof2calltree - from package: kcachegrind-converters

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

Error in other languages:
dprof2calltree: bevel nie gevind nie
dprof2calltree: comandă negăsită
dprof2calltree: comando não encontrado
dprof2calltree: commande introuvable
dprof2calltree: command not found
dprof2calltree: käsku ei ole
dprof2calltree: không tìm thấy lệnh
dprof2calltree: komanda nerasta
dprof2calltree: Kommando nicht gefunden.
dprof2calltree: kommandot finns inte
dprof2calltree: komut yok
dprof2calltree: nie znaleziono polecenia
dprof2calltree: níor aimsíodh an t-ordú
dprof2calltree: no se encontró la orden
dprof2calltree: no s'ha trobat l'ordre
dprof2calltree: opdracht niet gevonden
dprof2calltree: parancs nem található
dprof2calltree: perintah tidak ditemukan
dprof2calltree: príkaz nenájdený
dprof2calltree: příkaz nenalezen
dprof2calltree: команда не найдена
dprof2calltree: командата не е открита
dprof2calltree: 命令找不到
dprof2calltree: コマンドが見つかりません