I am trying to use upload api for one of my application perform the upload and scan process from command lines. First step I have used to uploadfile command line to upload the files in sandbox. And next step i have used beginprescan from commandline and it throws me the "Cannot prescan a build with no uploaded/valid files". However i have logged into the veracode and verified the files being uploaded correctly. Does any one has come across with the above message then please let me know the solution.

thanks