shmidcat: 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/shmidcat - from package: gtkwave

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

On Debian possible default full paths are:

/usr/bin/shmidcat - from package: gtkwave

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

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