Client closed connection before receiving the entire response

Hi I am using URLFilePromise to download a zip file from my server to desktop using an air app. The zip file is about 200MB, but after it reaches downloading about 7 MB , urlFilePromise is dispatching complete event. I could see the following error message in charles debugging proxy saying "Client closed connection before receiving the entire response". I have tried the same download url in the browser and it works fine. Please suggest me, What causes this issue??, how to resolve this??

I am using http protocol to download this file.