FTP Error - 550 Unexpected reply code

Hi Guys,

I am encountering the following error in my QA Environment.

Error Attempt to process file failed with com.sap.aii.adapter.file.ftp.FTPEx: 550 Unexpected reply codeThe filename, directory name, or volume label syntax is incorrect.

In my receiver FTP channel, I have set the 'Temporary File Name Scheme' as '*.tmp'. I have the same setup in my Dev environment but no issue is encountered.

When I tried to removed it, the error is not occurring.

What do you think could be the issue?

Also, what should be the File Type if the temp file name scheme is *.tmp? Binary or Text?

Message Flow: IDOC -> File

Thanks and Regards,

Neil