ldapattrschemaparser.pl: 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 Debian possible default full paths are:

/usr/share/simplesamlphp/bin/ldapattrschemaparser.pl - from package: simplesamlphp

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

Error in other languages:
ldapattrschemaparser.pl: bevel nie gevind nie
ldapattrschemaparser.pl: comandă negăsită
ldapattrschemaparser.pl: comando não encontrado
ldapattrschemaparser.pl: commande introuvable
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ldapattrschemaparser.pl: không tìm thấy lệnh
ldapattrschemaparser.pl: komanda nerasta
ldapattrschemaparser.pl: Kommando nicht gefunden.
ldapattrschemaparser.pl: kommandot finns inte
ldapattrschemaparser.pl: komut yok
ldapattrschemaparser.pl: nie znaleziono polecenia
ldapattrschemaparser.pl: níor aimsíodh an t-ordú
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ldapattrschemaparser.pl: opdracht niet gevonden
ldapattrschemaparser.pl: parancs nem található
ldapattrschemaparser.pl: perintah tidak ditemukan
ldapattrschemaparser.pl: príkaz nenájdený
ldapattrschemaparser.pl: příkaz nenalezen
ldapattrschemaparser.pl: команда не найдена
ldapattrschemaparser.pl: командата не е открита
ldapattrschemaparser.pl: 命令找不到
ldapattrschemaparser.pl: コマンドが見つかりません