Problem in Append Option at Receiver File Adapter

Hi all,

Iam doing Idoc---File scenario and doing FCC at receiver side.

Iam using Shared Folder ( '
sapdevxi\Files\XI_TEST\ ) to drop the files at receiver end. and set the File construction mode as APPEND

I send one Idoc and created file at taregt Directory, now file is still there in target directory.

now i sent 2nd Idoc , this time it should be append to the already existing file.

But it is saying the error in Communication channel monitoring

Message processing failed. Cause: com.sap.aii.af.ra.ms.api.RecoverableException: Target file '
sapdevxi\Files\XI_TEST\item.txt' already exists and must not be overwritten

Please suggest me

Regards