vcd2lxt2: 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/vcd2lxt2 - from package: gtkwave

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

On Debian possible default full paths are:

/usr/bin/vcd2lxt2 - from package: gtkwave

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

Error in other languages:
vcd2lxt2: bevel nie gevind nie
vcd2lxt2: comandă negăsită
vcd2lxt2: comando não encontrado
vcd2lxt2: commande introuvable
vcd2lxt2: command not found
vcd2lxt2: käsku ei ole
vcd2lxt2: không tìm thấy lệnh
vcd2lxt2: komanda nerasta
vcd2lxt2: Kommando nicht gefunden.
vcd2lxt2: kommandot finns inte
vcd2lxt2: komut yok
vcd2lxt2: nie znaleziono polecenia
vcd2lxt2: níor aimsíodh an t-ordú
vcd2lxt2: no se encontró la orden
vcd2lxt2: no s'ha trobat l'ordre
vcd2lxt2: opdracht niet gevonden
vcd2lxt2: parancs nem található
vcd2lxt2: perintah tidak ditemukan
vcd2lxt2: príkaz nenájdený
vcd2lxt2: příkaz nenalezen
vcd2lxt2: команда не найдена
vcd2lxt2: командата не е открита
vcd2lxt2: 命令找不到
vcd2lxt2: コマンドが見つかりません