Hi Hristo Valyavicharski,
I used valid ".csv" file only And the file size is 6.22 MB only. I checked with my administartors they are allowing maximum 50 MB file.
I am using IE9 browser. In DEVT machine we don't have any issue. Only UAT environment we are getting this issue. there we have 6 web front servers.
I strongly believe it is a configuration issue? what are other chances? Any idea?
Thanks in Advance.