A map has 10 input cards and 5 output cards. The map fails with the message one or more inputs was invalid. What is the next step to take to determine the cause of the error?

A rules trace tracks the execution of map rules and conditions, not the raw content of input data, so it would not directly reveal which input was invalid.

A summary content trace captures the data content flowing through each card during map execution, allowing the analyst to inspect what data each of the 10 input cards received and identify which one contained invalid content. This is the most direct diagnostic tool for tracing input validation failures in a multi-card map. It narrows the problem to a specific card and data value without requiring map reconfiguration.

Enabling backup on input cards preserves data for future reference but does not actively diagnose which card caused the current failure.

Adding Restart attributes affects map restart behavior after failure and does not help identify or diagnose the invalid input that caused the original error.