Apex Class Errors

Learn how to identify, troubleshoot and fix the common "Attempt to de-reference a null object" error in Salesforce Apex code with practical solutions and code examples.

Understand the common causes and solutions for the Salesforce "Entity is deleted" error that occurs when trying to reference or modify records that have been deleted.

Learn how to write effective test classes for Salesforce addError() validation logic with practical examples using Database.SaveResult, try/catch blocks, and SObject error methods.

Learn effective strategies for handling error records in Batch Apex, including Database.Stateful tracking, email notifications, and BatchApexErrorEvent implementation.

Learn proven methods to avoid the Mixed DML Operation error in Salesforce test classes when working with setup and non-setup objects in the same transaction.

Learn how to prevent Mixed DML Operation errors in Salesforce batch apex classes by separating setup and non-setup object operations using @future methods and other techniques.

Learn how to identify, troubleshoot and fix the common "Attempt to dereference a null object" error in Salesforce Apex code with practical solutions and prevention techniques.

Learn how to troubleshoot and fix the common "System.NullPointerException: Argument cannot be null" error in Salesforce Apex code with step-by-step solutions.

Learn effective strategies to prevent "Apex heap size too large" errors in Salesforce by optimizing your code, using SOQL wisely, and implementing best practices.