sems-logfile-callextract: 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/sbin/sems-logfile-callextract - from package: sems

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

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