asn1Decoding: 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/asn1Decoding - from package: libtasn1-tools

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

On Debian possible default full paths are:

/usr/bin/asn1Decoding - from package: libtasn1-bin

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

Error in other languages:
asn1Decoding: bevel nie gevind nie
asn1Decoding: comandă negăsită
asn1Decoding: comando não encontrado
asn1Decoding: commande introuvable
asn1Decoding: command not found
asn1Decoding: käsku ei ole
asn1Decoding: không tìm thấy lệnh
asn1Decoding: komanda nerasta
asn1Decoding: Kommando nicht gefunden.
asn1Decoding: kommandot finns inte
asn1Decoding: komut yok
asn1Decoding: nie znaleziono polecenia
asn1Decoding: níor aimsíodh an t-ordú
asn1Decoding: no se encontró la orden
asn1Decoding: no s'ha trobat l'ordre
asn1Decoding: opdracht niet gevonden
asn1Decoding: parancs nem található
asn1Decoding: perintah tidak ditemukan
asn1Decoding: príkaz nenájdený
asn1Decoding: příkaz nenalezen
asn1Decoding: команда не найдена
asn1Decoding: командата не е открита
asn1Decoding: 命令找不到
asn1Decoding: コマンドが見つかりません