This should be pretty straight forward, but I have been struggling with model builder. I have a file of about 30,000 individual buffers, many of which overlap. I simply want to use model builder to loop through each buffer. I have a land cover layer that I want to use to estimate the percentage of each land cover type in each buffer (percent forested, percent urban, etc). I've seen others post similar questions, but haven't been able to get the solutions to quite work. I pasted in a screen shot of the model so far. I also tried it using the tool for iterating over rows, but that didn't work either. The current error message says that the tabulate_shape_each file does not match the format in the file I want to append to, but they should be the same. Ideas?