meshs3d: 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/meshs3d - from package: meshs3d

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

Error in other languages:
meshs3d: bevel nie gevind nie
meshs3d: comandă negăsită
meshs3d: comando não encontrado
meshs3d: commande introuvable
meshs3d: command not found
meshs3d: käsku ei ole
meshs3d: không tìm thấy lệnh
meshs3d: komanda nerasta
meshs3d: Kommando nicht gefunden.
meshs3d: kommandot finns inte
meshs3d: komut yok
meshs3d: nie znaleziono polecenia
meshs3d: níor aimsíodh an t-ordú
meshs3d: no se encontró la orden
meshs3d: no s'ha trobat l'ordre
meshs3d: opdracht niet gevonden
meshs3d: parancs nem található
meshs3d: perintah tidak ditemukan
meshs3d: príkaz nenájdený
meshs3d: příkaz nenalezen
meshs3d: команда не найдена
meshs3d: командата не е открита
meshs3d: 命令找不到
meshs3d: コマンドが見つかりません