match_parens: 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/match_parens - from package: texlive-extra-utils

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

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