wcsremap: command not found

Have You tried accessing the binary with the full path?

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/wcsremap - from package: wcstools

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