kwrapper4: 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 CentOS possible default full paths are:

/usr/bin/kwrapper4 - from package: kdelibs

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/kwrapper4 - from package: kdelibs-bin

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

Error in other languages:
kwrapper4: bevel nie gevind nie
kwrapper4: comandă negăsită
kwrapper4: comando não encontrado
kwrapper4: commande introuvable
kwrapper4: command not found
kwrapper4: käsku ei ole
kwrapper4: không tìm thấy lệnh
kwrapper4: komanda nerasta
kwrapper4: Kommando nicht gefunden.
kwrapper4: kommandot finns inte
kwrapper4: komut yok
kwrapper4: nie znaleziono polecenia
kwrapper4: níor aimsíodh an t-ordú
kwrapper4: no se encontró la orden
kwrapper4: no s'ha trobat l'ordre
kwrapper4: opdracht niet gevonden
kwrapper4: parancs nem található
kwrapper4: perintah tidak ditemukan
kwrapper4: príkaz nenájdený
kwrapper4: příkaz nenalezen
kwrapper4: команда не найдена
kwrapper4: командата не е открита
kwrapper4: 命令找不到
kwrapper4: コマンドが見つかりません