test_asyncnotif: command not found

Have You tried accessing the binary with the full path?

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/test_asyncnotif - from package: openchange-client

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