pscontour: 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/pscontour - from package: GMT

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

On Debian possible default full paths are:

/usr/lib/gmt/bin/pscontour - from package: GMT

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

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