## Maintaining catalogs

JReport Designer provides a tool - JReport Catalog Doctor for you to maintain catalogs and diagnose problems with catalogs. After reading through this chapter, you will understand how to use the Catalog Doctor to diagnose the specific components of catalogs: connections, tables and fields, formulas and summaries, and queries.

The following topics describe how to use the Catalog Doctor:

- Errors the Catalog Doctor can detect
- Using the Catalog Doctor
- Diagnosing and fixing problems