rabema_prepare_sam: 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/rabema_prepare_sam - from package: seqan-apps
/usr/lib/seqan/bin/rabema_prepare_sam - from package: seqan-apps

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

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