Hi Rajasekhar,
It looks like you have used an invalid option with -RM (read mode). it should either be file_data or file_list, or use -WM (write mode) for create, overwrite, or append depending on what you are intending to do. It also looks like you are missing a path (-P) to your files on the SFTP server. Make sure you test connection values with a tool like Filezilla just to ensure that those are correct as well.
https://www.ibm.com/docs/en/ste/10.1?topic=adapters-secure-file-transfer-protocol-sftp-adapter
Good luck!
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Lisa Edwards
Software Engineer / Subject Matter Expert
Rainbow Data Systems, Inc
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