erl_call: 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/lib64/erlang/lib/erl_interface-3.7.5/bin/erl_call - from package: erlang-erl_interface

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

On Debian possible default full paths are:

/usr/bin/erl_call - from package: erlang-base-hipe
/usr/lib/erlang/lib/erl_interface-3.7.18/bin/erl_call - from package: erlang-base-hipe
/usr/bin/erl_call - from package: erlang-base
/usr/lib/erlang/lib/erl_interface-3.7.18/bin/erl_call - from package: erlang-base
/usr/lib/debug/usr/lib/erlang/lib/erl_interface-3.7.18/bin/erl_call - from package: erlang-dbg

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

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