---
title: badCustomBlockSource
framework: coremedia
role: symbol
role_heading: Type Property
path: coremedia/cmblockbuffer/error/badcustomblocksource
---

# badCustomBlockSource

An error that indicates an attempt to create a block buffer without a valid source.

## Declaration

```swift
static let badCustomBlockSource: NSError
```

## See Also

### Errors

- [badLengthParameter](coremedia/cmblockbuffer/error/badlengthparameter.md)
- [badOffsetParameter](coremedia/cmblockbuffer/error/badoffsetparameter.md)
- [badPointerParameter](coremedia/cmblockbuffer/error/badpointerparameter.md)
- [blockAllocationFailed](coremedia/cmblockbuffer/error/blockallocationfailed.md)
- [emptyBlockBuffer](coremedia/cmblockbuffer/error/emptyblockbuffer.md)
- [insufficientSpace](coremedia/cmblockbuffer/error/insufficientspace.md)
- [structureAllocationFailed](coremedia/cmblockbuffer/error/structureallocationfailed.md)
- [unallocatedBlock](coremedia/cmblockbuffer/error/unallocatedblock.md)