chemeq_l: 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:

/var/lib/wims/public_html/bin/chemeq_l - from package: wims

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

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