csymmatch: 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/csymmatch - from package: clipper

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

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