TypeError: Cannot call method on undefined object

getReference() method returned null because the referenced record does not exist or the reference field is empty, then attempting to call methods on the null result. (high likelihood)

GlideRecord query returned no results and next() was not checked before calling methods on the assumed record object. (high likelihood)

API object or ServiceNow class failed to instantiate properly due to missing parameters, invalid configuration, or insufficient privileges. (medium likelihood)

Variable or object was declared but never initialized, or was explicitly set to null/undefined before method call. (medium likelihood)

Asynchronous operation has not completed yet, leaving the object undefined when the method call executes. (low likelihood)

Step 1: Check System Diagnostics > Log > Application Log for the complete stack trace to identify the exact line and script where the error occurs.

Step 2: Examine the specific line in your script and identify which object is calling the method that's failing.

Step 3: Add null checking before method calls using if statements or conditional operators to verify the object exists and is not null.

Step 4: If using getReference(), verify the reference field contains a valid sys_id and the referenced record exists in the target table.

Step 5: For GlideRecord operations, always check if next() returns true before accessing record methods or properties.

Step 6: Use gs.debug() or gs.log() statements to output object values and confirm they are properly instantiated before method calls.

Step 7: Test the corrected script in a development environment and monitor logs to confirm the error is resolved.

Step 8: Review all similar code patterns in your instance to prevent the same error from occurring elsewhere.