srec_cmp: 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/srec_cmp - from package: srecord

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

On Debian possible default full paths are:

/usr/bin/srec_cmp - from package: srecord

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

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