The issue described involves an error when attempting to run a Hexagon binary using QEMU. The specific error message is "Error mapping file: Invalid argument." This indicates a problem during the execution or initialization phase of QEMU, specifically related to how the binary file is being handled or mapped into memory.

Given that this occurs at runtime and relates to the process of loading or executing the binary, it falls under the category of **runtime** errors. Runtime issues typically occur when the program is executing and encounters problems such as invalid arguments, incorrect mappings, or other execution-related failures.

Therefore, based on the information provided:

**Answer:** runtime