I am running in to a strange issue. On my local computer my export to excel/word/pdf script is running perfectly fine. But as soon as I run the script from live server, it creates a 0 byte file. Unfortunately, it doesn't even trigger any error. It silently opens the download dialog and result in either a 0 byte OR in a best shot couple of rows.

memory_limit, max_upload_size etc are cross matched local server and everything is perfectly fine.

Can you please help me????