> ## Documentation Index
> Fetch the complete documentation index at: https://docs.abbyy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Standard Return Codes

Here is a list of the standard return codes of ABBYY FineReader Engine functions and properties.

| Return code                 | Value                        | Description                                                                            |
| --------------------------- | ---------------------------- | -------------------------------------------------------------------------------------- |
| S\\\_OK                     | 0 (\&H00000000L)             | Method completed successfully.                                                         |
| E\\\_OUTOFMEMORY            | \\-2147024882 (\&H8007000EL) | There was not enough memory to perform the operation.                                  |
| E\\\_UNEXPECTED             | \\-2147418113 (\&H8000FFFFL) | Unexpected internal error.                                                             |
| E\\\_ABORT                  | \\-2147467260 (\&H80004004L) | Operation was aborted by the user.                                                     |
| E\\\_NOTIMPL                | \\-2147467263 (\&H80004001L) | Method is not implemented.                                                             |
| E\\\_POINTER                | \\-2147467261 (\&H80004003L) | Invalid pointer argument.                                                              |
| E\\\_INVALIDARG             | \\-2147024809 (\&H80070057L) | One or more arguments are invalid.                                                     |
| ERROR\\\_DISK\\\_FULL       | \\-2147024784 (\&H80070070L) | Not enough disk space.                                                                 |
| CO\\\_E\\\_OBJNOTCONNECTED  | \\-2147220995 (\&H800401FDL) | A pointer to an object was passed that is no longer valid (this object was destroyed). |
| CO\\\_E\\\_NOT\\\_SUPPORTED | \\-2147467231 (\&H80004021L) | Some property or method is not available under the current license.                    |
| CLASS\\\_E\\\_NOTLICENSED   | \\-2147221230 (\&H80040112L) | Licensing error.                                                                       |
| E\\\_FAIL                   | \\-2147467259 (\&H80004005L) | Unspecified error.                                                                     |

<Note>
  These return codes you can find in the Microsoft® Platform Software Development Kit (SDK) header file winerror.h.
</Note>

Here is a list of interface-specific return codes of ABBYY FineReader Engine functions and properties. All these codes are defined in the ABBYY FineReader Engine type library.

| Return code                                            | Value                       | Description                                                                           |
| ------------------------------------------------------ | --------------------------- | ------------------------------------------------------------------------------------- |
| FREN\\\_E\\\_PATTERN\\\_TRAINING\\\_ABORTED            | \\-2147221503 (\&H80040001) | Pattern training was aborted by the user.                                             |
| FREN\\\_E\\\_INVALID\\\_CREATION\\\_DATE\\\_FORMAT     | \\-2147221502 (\&H80040002) | During export to PDF/XPS format the creation date format was found to be invalid.     |
| FREN\\\_E\\\_INVALID\\\_MODIFICATION\\\_DATE\\\_FORMAT | \\-2147221501 (\&H80040003) | During export to PDF/XPS format the modification date format was found to be invalid. |
| FREN\\\_E\\\_PDFA\\\_CONVERSION\\\_FAILED              | \\-2147221500 (\&H80040004) | An error occurred while converting the page of the PDF document.                      |

Other return codes are possible, specifically those related to file system errors.

## See also

[Error Handling](/fine-reader/engine/guided-tour/advanced-techniques/programming-aspects/error-handling)