Windows 10 , Nvidia GT 740 graphic card, AMD FX processor , 8 GB RAM
In Cycles Standalone, when we render image with equirectangular camera to create 360 panorama, it renders image in whicwhere h one equirectangular image is repeated 8 times. (In 4 x 2 grid ). I have attached screenshot.
If rendered within blenders , cycles renders equirectangular image fine.