ZIP File has damaged contents - Multiple file download

Hi,

I am using ZIP API in Web Dynpro JAVA for multiple file download scenario.

Issue:--->

Some files are not opening correctly after unzipping the ZIP file.

Example-1: some PDF files gives out message that " "

Example-2: Also, a JPG file shows only upper half of the image.

So in all, the content of generated ZIP file are damaged.

Any idea why this is happening?

Thanks & regards,

Amey