tracepp: 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/tracepp - from package: mcrl2

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

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