freefoam-applyWallFunctionBoundaryConditions: 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/bin/freefoam-applyWallFunctionBoundaryConditions - from package: freefoam

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