e-PCR: 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/e-PCR - from package: ncbi-epcr

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