mscompress: 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/mscompress - from package: mscompress

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

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