# RCERR_UNKNOWN

*LSL constant*

```lsl
integer RCERR_UNKNOWN = -1;
```

Raycast error indicating an unspecified failure.

Constant groups: [RayCastError](/constants/groups/RayCastError/)

## See also

### Functions

- [llCastRay](/functions/llCastRay/)

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*Source: [RCERR UNKNOWN](https://wiki.secondlife.com/wiki/RCERR_UNKNOWN) on the Second Life Wiki. Content from the Second Life Wiki article RCERR UNKNOWN (revision 1160624, 2012-01-05), CC BY-SA 3.0.*

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From lsl.dev: https://lsl.dev/constants/RCERR_UNKNOWN/