bison++: 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:

/usr/bin/bison++ - from package: bison++

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

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