kopete_latexconvert.sh: 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 CentOS possible default full paths are:

/usr/bin/kopete_latexconvert.sh - from package: kdenetwork

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

On Debian possible default full paths are:

/usr/bin/kopete_latexconvert.sh - from package: kopete

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