sgmlsasp: 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 CentOS possible default full paths are:

/usr/bin/sgmlsasp - from package: linuxdoc-tools

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/sgmlsasp - from package: linuxdoc-tools

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

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