ossim-space-imaging: 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-space-imaging - from package: ossim-core

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

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