# Errors

> USearch for Wolfram

A failing call answers `Failure[status, <|"MessageTemplate"->detail|>]`, where the status is the C name `usearch_status_name` spells, such as `shape-mismatch`, `io` or `read-only`, and the detail the engine's message:

```wolfram
result = DenseInsert[index, {44}, {{1.0, 2.0}}];
If[FailureQ[result], result[[1]]] (* "shape-mismatch" *)
result["MessageTemplate"] (* "The rows' width differs from the index's" *)
```

Arguments the verb's types do not admit fail as `invalid-argument`, and a call naming a released handle by its ID fails as `uninitialized`.