Documents uploading while filling dvat7 part(c)

Sir, I am filing DVAT 7 PART C FIRST I FILL PART C UNDER DVAT 7 AND AFTER THAT I WAS UPLOADING SUPPORTING DOCUMENTS ITS SHOWING SELECT RECORD FIRST ERROR. PLEASE SOMEONE SUGGEST THAT MAY I HAVE TO SUBMIT THE APPLICATION FIRST BEFORE UPLOADING THE DOCUMENTS OR WHAT IS THE PROCEDURE TO COMPLETE THE PROCESS.