regview: 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/lib64/libreoffice/ure/bin/regview - from package: libreoffice-ure

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

On Debian possible default full paths are:

/usr/lib/debug/usr/lib/ure/bin/regview - from package: ure-dbg
/usr/lib/ure/bin/regview - from package: ure

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

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