SAP PI empty file to proxy scenario

Hi experts,

I have to build an empty file to proxy scenario.

in my CC Sender File I use 'File Content Conversion' as message protocol. But my inbound file is empty, so I have an error in sxi_monitor :

Problem while determining receivers using interface mapping: Error while determining root tag of XML: BOM / charset detection failed

I want change my CC SenderFile and use 'File' as message protocole, but i don't how define receiver determination without interface determination.

Is it possible ?

Thanks