: Other instances of Error 1210 suggest that having an empty or incomplete mod list can sometimes trigger the engine to look for files that haven't been properly initialized. Reports on GitHub Issue #506 highlight that this is a recurring stumbling block for modders setting up their animation load orders.
Users frequently encounter errors related to this file when using the or FNIS .
The .hkx file extension stands for (or more accurately, a serialized Havok asset). Havok is a middleware physics engine used in a massive number of AAA video games. While the engine handles physics (like gravity and collisions), it also handles Animation Behaviors .