Prefab and materials icon turned white on another system

Hi,

Our problem seems like rare, as I did research and none find to answer my question.

The problem is, I have created prefabs ,materials on my system and then exported it to my partner’s System.

Now when my partner import it on his system all prefabs and materials I created showing “white” icon (not gray)

When we try to drag it to scene its not working.

Does anyone know answer to it?

Wrong unity version? You will get that behaviour if you create a scene or prefab or material in U5 and import it in U4.

Thanks for your response, I am on Unity 5.1 whereas my partner is having Unity 5.0.2f4 , It used to work till yesterday.