integer_calc: 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 Debian possible default full paths are:

/var/lib/wims/public_html/bin/integer_calc - from package: wims

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

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