avcimport: 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/avcimport - from package: avce00

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