---
title: NFCReaderError.Code.readerSessionInvalidationErrorSystemIsBusy
framework: corenfc
role: symbol
role_heading: Case
path: corenfc/nfcreadererror-swift.struct/code/readersessioninvalidationerrorsystemisbusy
---

# NFCReaderError.Code.readerSessionInvalidationErrorSystemIsBusy

The reader session failed because the system is busy.

## Declaration

```swift
case readerSessionInvalidationErrorSystemIsBusy
```

## See Also

### Session Errors

- [NFCReaderError.Code.readerSessionInvalidationErrorFirstNDEFTagRead](corenfc/nfcreadererror-swift.struct/code/readersessioninvalidationerrorfirstndeftagread.md)
- [NFCReaderError.Code.readerSessionInvalidationErrorSessionTerminatedUnexpectedly](corenfc/nfcreadererror-swift.struct/code/readersessioninvalidationerrorsessionterminatedunexpectedly.md)
- [NFCReaderError.Code.readerSessionInvalidationErrorSessionTimeout](corenfc/nfcreadererror-swift.struct/code/readersessioninvalidationerrorsessiontimeout.md)
- [NFCReaderError.Code.readerSessionInvalidationErrorUserCanceled](corenfc/nfcreadererror-swift.struct/code/readersessioninvalidationerrorusercanceled.md)
- [NFCReaderError.Code.readerSessionInvalidationErrorFirstNDEFTagRead](corenfc/nfcreadererror-swift.struct/code/readersessioninvalidationerrorfirstndeftagread.md)
- [NFCReaderError.Code.readerSessionInvalidationErrorSessionTerminatedUnexpectedly](corenfc/nfcreadererror-swift.struct/code/readersessioninvalidationerrorsessionterminatedunexpectedly.md)
- [NFCReaderError.Code.readerSessionInvalidationErrorSessionTimeout](corenfc/nfcreadererror-swift.struct/code/readersessioninvalidationerrorsessiontimeout.md)
- [NFCReaderError.Code.readerSessionInvalidationErrorUserCanceled](corenfc/nfcreadererror-swift.struct/code/readersessioninvalidationerrorusercanceled.md)