t34out.txt: 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/share/doc/r-cran-qtl/examples/bin/test/regression/t34out.txt - from package: r-cran-qtl

You may install the required package with command apt-get install {package}
Error in other languages:
t34out.txt: bevel nie gevind nie
t34out.txt: comandă negăsită
t34out.txt: comando não encontrado
t34out.txt: commande introuvable
t34out.txt: command not found
t34out.txt: käsku ei ole
t34out.txt: không tìm thấy lệnh
t34out.txt: komanda nerasta
t34out.txt: Kommando nicht gefunden.
t34out.txt: kommandot finns inte
t34out.txt: komut yok
t34out.txt: nie znaleziono polecenia
t34out.txt: níor aimsíodh an t-ordú
t34out.txt: no se encontró la orden
t34out.txt: no s'ha trobat l'ordre
t34out.txt: opdracht niet gevonden
t34out.txt: parancs nem található
t34out.txt: perintah tidak ditemukan
t34out.txt: príkaz nenájdený
t34out.txt: příkaz nenalezen
t34out.txt: команда не найдена
t34out.txt: командата не е открита
t34out.txt: 命令找不到
t34out.txt: コマンドが見つかりません