# Validating mappings and reporting problems

Errors and warnings on persistent entities and mappings are indicated with a red error or yellow warning next to the resource with the error, as well as the parent containers up to the project.

Tip: Use the Project Properties page – Errors/Warnings and Java Persistence Preferences page – Errors/Warnings to specify which problems Dali will report.

Sample Errors and Warnings

This section contains information on the following:

- Error messages

- Warning messages

Related reference

- Project Properties page – Errors/Warnings

- Java Persistence Preferences page – Errors/Warnings

Related concepts

- Problems view