MIRO - HKONT is empty

hey iam trying to post an invoice using miro , everything works fine when i simulate it shows

G/L account - 160000 acount type k

G/L account - 191100 account type s

when i hit post it says that the document has some messages still..

and the message is HKONT is empty.

i have maintained the reconciliation account in the vendor master as 160000.

what could be the issue ??