How to Fix a Unity Animation Curve Driving a Gameplay Value Stuck at the Last Keyframe

Extra curves on a clip can drive things like a charge meter via animator.GetFloat. If that value sticks at its end, the clip is parked on its last frame. Here is how to keep it live.

How to fix it

1. Check the clip is still playing

animator.GetFloat("ChargeCurve") returns the value at the current playhead. A non-looping state holds the final keyframe, so the value stops changing when the clip ends.

2. Match the curve parameter name

The float parameter you read must share the exact name of the curve added in the clip's Curves foldout. A typo silently returns the default 0.

3. Loop or re-trigger as needed

If the gameplay value should keep oscillating, enable Loop Time on the clip, or re-enter the state. Otherwise sample the curve only during the active window.

Catching the ones you can't reproduce

The hardest version of this to fix is the one you can't reproduce — it only happens on a player's hardware, OS, driver, or save state, under conditions that simply aren't present on your machine. A report that says “it crashed” or “it froze” gives you nothing to act on, so the bug survives release after release while quietly costing you players.

Automatic error capture closes that gap. Each failure arrives with its full stack trace, the device and OS, the build number, and a breadcrumb trail of what the player did right before it broke, so even a failure you have never seen becomes a specific, reproducible issue. Fold identical failures into one signature ranked by how many players each hits, and your worklist sorts itself worst-first instead of arriving as a stream of vague complaints.

This is where a tool like Bugnet earns its place. Its SDK captures every Unity error automatically with the full stack trace plus device, OS, memory, build, and game-state context, folds duplicates into one grouped issue with an occurrence count, and ties each to the build it first appeared on — so you fix the problem that hurts the most players first and confirm it is gone when its signature disappears from the next release.