gcv-long: 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/gcv-long - from package: scotch

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

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