# API Errors and Warnings Property Page

API problems are created during project builds (auto and full builds), the tooling breaks down the types of problems reported into one of three categories:

1. Usage Problems - restricted code is being called by unauthorized plug-ins.
2. Binary Incompatibilities - changes between versions are not binary compatible.
3. Version Problems - plug-in versions or code versions (@since tags) not correct.

You can also configure the problem severities for the entire workspace as well using the Plug-in Development > API Errors/Warnings preference page.

For a complete listing of the preferences and their descriptions, please refer to the API Errors/Warnings preference page.

API Errors and Warnings Preferences