SFTP receiver channel Archive filename isssue

Hi,

I am working on SAP SFTP adapter (SAP PI7.4).

SFTP receiver channel is placing the file with correct filename as generated by dynamic configuration code but sftp channel is adding an extra .txt extension in filename while archiving.

Example:       Actual Filename: CCBGI.SSEN_TNG.BATCH0000000000000052.sft

                    At archive folder : CCBGI.SSEN_TNG.BATCH0000000000000052.sft.txt

Please suggest resolution for this.

Thanks & Regards,

Nida Fatima