Hi, Sireesha,
Blue Prism Web API works well, however, it sends the file in base64 encoded as a string. If the target expects binary format you need to write a custom code stage which does it. If you can download RestSharp.dll and I am attaching VBO which sends the file in binary format to the target.
I am not sure if this helps in your case but recently I discovered this in my use case and the reason was really that through Web API it is sent as base64 encoded.
Regards,
Zdenek