I recieved the same texture problem. It appears after I start rendering my animation, and have to click yes two times when the two dialog boxes pop up. I solved the problem by relinking my textures. Most of my textures were presets, so after saving the project under another name, I reloaded my preset (studio and lights) and copy pasted them all into my current studio and light objects in my project. Then I rendered it and it quit giving me a texture error.