primeDTLSR: 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/primeDTLSR - from package: prime-phylo

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