Diagnosis
You want to post a down payment chain that has status 'write off' andhas already been written off.

System Response
No further postings can be made for the down payment chain in thisstatus.

Procedure
1. Check if you are processing the correct DP chain.
2. If you want to continue posting on this DP chain, you must cancel thelast posting and reset the status from 'Write Off' to 'Release'.
3. Or ask your system administrator how to proceed.