vcd2lxt: 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/vcd2lxt - from package: gtkwave

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

On Debian possible default full paths are:

/usr/bin/vcd2lxt - from package: gtkwave

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

Error in other languages:
vcd2lxt: bevel nie gevind nie
vcd2lxt: comandă negăsită
vcd2lxt: comando não encontrado
vcd2lxt: commande introuvable
vcd2lxt: command not found
vcd2lxt: käsku ei ole
vcd2lxt: không tìm thấy lệnh
vcd2lxt: komanda nerasta
vcd2lxt: Kommando nicht gefunden.
vcd2lxt: kommandot finns inte
vcd2lxt: komut yok
vcd2lxt: nie znaleziono polecenia
vcd2lxt: níor aimsíodh an t-ordú
vcd2lxt: no se encontró la orden
vcd2lxt: no s'ha trobat l'ordre
vcd2lxt: opdracht niet gevonden
vcd2lxt: parancs nem található
vcd2lxt: perintah tidak ditemukan
vcd2lxt: príkaz nenájdený
vcd2lxt: příkaz nenalezen
vcd2lxt: команда не найдена
vcd2lxt: командата не е открита
vcd2lxt: 命令找不到
vcd2lxt: コマンドが見つかりません