stdcmapppm: 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/stdcmapppm - from package: ivtools-bin

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

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