---
title: kAudioFileOperationNotSupportedError
framework: audiotoolbox
role: symbol
role_heading: Global Variable
path: audiotoolbox/kaudiofileoperationnotsupportederror
---

# kAudioFileOperationNotSupportedError

The operation cannot be performed.

## Declaration

```swift
var kAudioFileOperationNotSupportedError: OSStatus { get }
```

## Discussion

Discussion For example, setting the kAudioFilePropertyAudioDataByteCount constant to increase the size of the audio data in a file is not a supported operation. Write the data instead.

## See Also

### Result Codes

- [kAudioFileUnspecifiedError](audiotoolbox/kaudiofileunspecifiederror.md)
- [kAudioFileUnsupportedFileTypeError](audiotoolbox/kaudiofileunsupportedfiletypeerror.md)
- [kAudioFileUnsupportedDataFormatError](audiotoolbox/kaudiofileunsupporteddataformaterror.md)
- [kAudioFileUnsupportedPropertyError](audiotoolbox/kaudiofileunsupportedpropertyerror.md)
- [kAudioFileBadPropertySizeError](audiotoolbox/kaudiofilebadpropertysizeerror.md)
- [kAudioFilePermissionsError](audiotoolbox/kaudiofilepermissionserror.md)
- [kAudioFileNotOptimizedError](audiotoolbox/kaudiofilenotoptimizederror.md)
- [kAudioFileInvalidChunkError](audiotoolbox/kaudiofileinvalidchunkerror.md)
- [kAudioFileDoesNotAllow64BitDataSizeError](audiotoolbox/kaudiofiledoesnotallow64bitdatasizeerror.md)
- [kAudioFileInvalidPacketOffsetError](audiotoolbox/kaudiofileinvalidpacketoffseterror.md)
- [kAudioFileInvalidFileError](audiotoolbox/kaudiofileinvalidfileerror.md)
- [kAudioFileNotOpenError](audiotoolbox/kaudiofilenotopenerror.md)
- [kAudioFileEndOfFileError](audiotoolbox/kaudiofileendoffileerror.md)
- [kAudioFilePositionError](audiotoolbox/kaudiofilepositionerror.md)
- [kAudioFileFileNotFoundError](audiotoolbox/kaudiofilefilenotfounderror.md)