Hi Bikram,
I checked and I find a bug with OSL scripts I will paste the scene here, is working but each time when I save the scene and open again the OSL script are ignore after I just change a little option then start working as should, I think for some reason is not saving correct the OSL still on the scene but is not loading correct.
Please check this with JIM is quite a big issue cause we can render in batch and cmd, OSL scripts which is quite the all point to support OSL.
Cheers,
JO