IDPosteriorErrorProbability: 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/IDPosteriorErrorProbability - from package: topp

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

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