piconv: 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 CentOS possible default full paths are:

/usr/bin/piconv - from package: perl

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/piconv - from package: perl

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

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