ossim-create-bitmask: 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-create-bitmask - from package: ossim-core

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

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