jalv.gtkmm: command not found

Have You tried accessing the binary with the full path?

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/jalv.gtkmm - from package: jalv

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