Debugging GAS with Console Commands

Utilize built-in Unreal Engine console commands to inspect active attributes, effects, and tags in real-time during your gameplay testing.

In this lesson, you will learn how to leverage built-in console commands to peer inside your AbilitySystemComponent (ASC) and verify the state of your attributes, effects, and tags in real-time.

When working with the Gameplay Ability System, it is common to encounter "silent failures"—situations where an ability fails to fire, or an attribute value doesn't update, without throwing a single compile error. To debug this, we use the showdebug abilitysystem command.

Using the Debug HUD

While in PIE (Play In Editor), open the console (the tilde ~ key) and type: showdebug abilitysystem

This toggle overlays a wealth of diagnostic data on your screen. You will see:

Active Gameplay Tags: A list of every tag currently applied to your actor, which is crucial for verifying if your GameplayEffect duration tags are actually being removed when intended.
Attributes: The current base and final values of your AttributeSets. This helps you confirm if your GameplayEffectExecutionCalculations are modifying values as expected.
Active Gameplay Effects: A list of effects currently modifying your actor, including their remaining duration and stack counts.

Targeted Inspection

If your scene is crowded with actors, the generic HUD might be overwhelming. You can isolate specific details using more granular commands:

AbilitySystem.Debug.PrintTags: Logs all tags owned by the ASC to the Output Log.
AbilitySystem.Debug.PrintAttributes: Logs the current attribute values to the Output Log, which is much easier to read for complex calculations.
AbilitySystem.Debug.PrintEffects: Provides a detailed list of all active effects currently applied to the target.

By utilizing these commands, you stop guessing why a character’s health isn't regenerating or why a status effect is "stuck." If an effect is missing, you can check the logs to see if it was blocked by a GameplayTag requirement or if it expired prematurely. This real-time feedback loop is essential for verifying your complex logic without needing to litter your C++ code with UE_LOG statements.

Key Takeaway: The showdebug abilitysystem console command is your primary tool for validating runtime GAS state, providing an immediate snapshot of tags, attributes, and effects to resolve logic discrepancies instantly.