gchemtable-0.14: 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/gchemtable-0.14 - from package: gcu-bin

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

Error in other languages:
gchemtable-0.14: bevel nie gevind nie
gchemtable-0.14: comandă negăsită
gchemtable-0.14: comando não encontrado
gchemtable-0.14: commande introuvable
gchemtable-0.14: command not found
gchemtable-0.14: käsku ei ole
gchemtable-0.14: không tìm thấy lệnh
gchemtable-0.14: komanda nerasta
gchemtable-0.14: Kommando nicht gefunden.
gchemtable-0.14: kommandot finns inte
gchemtable-0.14: komut yok
gchemtable-0.14: nie znaleziono polecenia
gchemtable-0.14: níor aimsíodh an t-ordú
gchemtable-0.14: no se encontró la orden
gchemtable-0.14: no s'ha trobat l'ordre
gchemtable-0.14: opdracht niet gevonden
gchemtable-0.14: parancs nem található
gchemtable-0.14: perintah tidak ditemukan
gchemtable-0.14: príkaz nenájdený
gchemtable-0.14: příkaz nenalezen
gchemtable-0.14: команда не найдена
gchemtable-0.14: командата не е открита
gchemtable-0.14: 命令找不到
gchemtable-0.14: コマンドが見つかりません