tc2rtf: 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/tc2rtf - from package: troffcvt

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

Error in other languages:
tc2rtf: bevel nie gevind nie
tc2rtf: comandă negăsită
tc2rtf: comando não encontrado
tc2rtf: commande introuvable
tc2rtf: command not found
tc2rtf: käsku ei ole
tc2rtf: không tìm thấy lệnh
tc2rtf: komanda nerasta
tc2rtf: Kommando nicht gefunden.
tc2rtf: kommandot finns inte
tc2rtf: komut yok
tc2rtf: nie znaleziono polecenia
tc2rtf: níor aimsíodh an t-ordú
tc2rtf: no se encontró la orden
tc2rtf: no s'ha trobat l'ordre
tc2rtf: opdracht niet gevonden
tc2rtf: parancs nem található
tc2rtf: perintah tidak ditemukan
tc2rtf: príkaz nenájdený
tc2rtf: příkaz nenalezen
tc2rtf: команда не найдена
tc2rtf: командата не е открита
tc2rtf: 命令找不到
tc2rtf: コマンドが見つかりません