How to get DLR from SMSC setting error code

[developerlearn999]

i saw this issue,
but i can't fond a way to setup the error code.
i am using the SSLClientMain for client side.
on server i do as follow's to send async status to the client (since i send it first to another system,
and can get result up 48 hours).
i used this code
https://stackoverflow.com/a/25885741/9698435
bu't can't set the "err" or "stat"