nicotine-import-winconfig: 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/nicotine-import-winconfig - from package: nicotine

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

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