---
title: readOnly
framework: coremedia
role: symbol
role_heading: Type Property
path: coremedia/cmtimebase/error/readonly
---

# readOnly

A timebase error that indicates the system attempts to modify a read-only timebase.

## Declaration

```swift
static let readOnly: NSError
```

## See Also

### Constants

- [allocationFailed](coremedia/cmtimebase/error/allocationfailed.md)
- [invalidParameter](coremedia/cmtimebase/error/invalidparameter.md)
- [missingRequiredParameter](coremedia/cmtimebase/error/missingrequiredparameter.md)
- [timerIntervalTooShort](coremedia/cmtimebase/error/timerintervaltooshort.md)