Hi Jaclaglez13,

How are you doing today?, As per my understanding, yeah, this issue usually happens when Unity Catalog affects function resolution across different tasks in a Workflow. Since your first task runs fine but the second one fails, it’s likely that the session loses access to built-in SQL functions when switching notebooks. A few things to try: use the fully qualified function name (org.apache.spark.sql.functions.date_format in Python or system.builtin.date_format in SQL) to ensure proper resolution, restart the cluster before the second task to refresh the session, or check if the function is available by running SHOW FUNCTIONS LIKE 'date_format';. If the function isn’t listed, the session might not be resolving built-in functions correctly. These should help get things running smoothly—let me know what works!

Regards,

Brahma