parrot_nci_thunk_gen: 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/parrot_nci_thunk_gen - from package: parrot-devel

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

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