### Diagnosing and fixing problems

After opening a catalog, you will then be shown the Catalog Doctor. All the resources in the opened catalog will be listed in the left panel of the Catalog Doctor window. Select a resource from the resource tree. In the right panel, you will see the information of the selected resource.

You should diagnose the resources in the following order:

- Connection
- Tables and fields
- Formulas and summaries
- Queries