Process Flow Designer checks the validity and completeness of the process flow while saving or updating the diagram. If there are any validation errors, Process Flow Designer displays the exception message. Components with validation errors have a red title bar. Process items with validation errors are marked with a red error icon. To view the error details, double click the process item or model component with the error, and click the Error Messages tab.

Process Flow Designer does not validate Java code defined in CustomCode or the SQL query when CustomDataGrid item while saving or updating the process flow. These validations are performed during the run-time of process flow hooks.