1, wrong format of reference: If the format of reference is not standardized or does not meet the requirements, it may lead to errors when exporting PDF format. When writing a paper, we should follow the academic norms and adopt the correct reference format.
2. Wrong citation format: If the citation format of references is incorrect, it may also lead to errors when exporting PDF format. When writing a paper, you should use the correct citation format, including the author, publication date, article title and other necessary information.
3. Editing software error: If there is an error or fault in the editing software used, it may also lead to an error when referencing the tag and exporting it to PDF format. When using editing software, a stable and reliable version should be used, and the software version should be updated in time.