helpztags: 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/helpztags - from package: vim-common

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

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