@FrancescaI2720  When configuring treatments in Pega and including placeholders from tables outside the primary context it is important to manage the properties effectively. While there is no explicit limit mentioned for the number of placeholders it is crucial to follow best practices to ensure optimal performance and maintainability. Here are some recommendations: 1. Column Name Length: Ensure that the column names do not exceed 27 characters to avoid issues with database mappings. 2. Avoid Empty Rows: Make sure that the tables do not contain empty rows as this can lead to data integrity issues. 3. Mapping Properties: Properly map the properties to their corresponding columns in the external database. This can be done through the External Mapping tab of the class rule. 4. Database Table Instance: Create a database table instance to map your class to a database entity in the marketing schema. 5. Performance Considerations: Be mindful of the performance implications of adding numerous placeholders. It is advisable to only expose the necessary properties to avoid unnecessary overhead. By adhering to these guidelines you can effectively manage the placeholders and ensure that your treatments are configured optimally.

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