apspreview: 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/apspreview - from package: apsfilter

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

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