ossim-img2rr: 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/ossim-img2rr - from package: ossim-core

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

Error in other languages:
ossim-img2rr: bevel nie gevind nie
ossim-img2rr: comandă negăsită
ossim-img2rr: comando não encontrado
ossim-img2rr: commande introuvable
ossim-img2rr: command not found
ossim-img2rr: käsku ei ole
ossim-img2rr: không tìm thấy lệnh
ossim-img2rr: komanda nerasta
ossim-img2rr: Kommando nicht gefunden.
ossim-img2rr: kommandot finns inte
ossim-img2rr: komut yok
ossim-img2rr: nie znaleziono polecenia
ossim-img2rr: níor aimsíodh an t-ordú
ossim-img2rr: no se encontró la orden
ossim-img2rr: no s'ha trobat l'ordre
ossim-img2rr: opdracht niet gevonden
ossim-img2rr: parancs nem található
ossim-img2rr: perintah tidak ditemukan
ossim-img2rr: príkaz nenájdený
ossim-img2rr: příkaz nenalezen
ossim-img2rr: команда не найдена
ossim-img2rr: командата не е открита
ossim-img2rr: 命令找不到
ossim-img2rr: コマンドが見つかりません