The image is kinda self explanatory I hope.
The texture mapping is set to UV, Ive tried to re-unwrap but that doesnt help either. It has never happened before 
Not a lot to go on is there ?
Are you going to supply example .blend files etc as you should be going for ALL support questions or leave us in the dark knowing nothing about your materials etc
Some of the many things you’ve not told us:
What renderer are you using in blender ?
Do you have more than one UV map ?
How are you applying textures ?