1 latex sometimes there such a strange question, the compiler can also generate pdf right at the beginning, but you read, read, over a period of time there will be a compilation error, and then compile or F9 life and death are not generated pdf file.
2 The strange thing is it compiled through, but said that in the final report has an error. That where there is wrong in this case is hard to find. However, there may be a compromise.
Click on the icon above can be generated. Dark can icon next to you can try, and some can also be generated.