> ## 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.

# EnableEngineLogging Method of the Engine Object

This method enables logging of errors, warnings and method calls.

## Syntax

### C++

```cpp theme={null}
HRESULT EnableEngineLogging(
  BSTR         settings
);
```

### C\#

```csharp theme={null}
void EnableEngineLogging(
  string settings
);
```

### Visual Basic .NET

```vb theme={null}
Sub EnableEngineLogging( _
  settings As String _
)
```

## Parameters

settings

\[in] Currently, this parameter must be a path to a folder where engine-wide log files will be written (absolute or UNC path). The folder must be writable by the calling process.

Forward compatibility: in future versions this parameter will accept a JSON string with additional logging settings; at present, only a plain folder path is supported.

## Return values

This method has no specific return values. It returns the [standard return values of ABBYY FineReader Engine functions](/fine-reader/engine/api-reference/return-codes).

## Remarks

* Enables Engine-level logging; log files are created in the specified folder for the “FREngine” component.

* If the folder is inaccessible or the path is invalid, the call fails with a standard error code. Ensure the application has sufficient permissions and free disk space.

* Enabling logging may reduce throughput due to I/O overhead.

* Future versions may interpret settings as JSON with options such as log levels, rotation, or file naming; do not depend on today’s string format beyond the requirement to pass a folder path.

## See also

[Engine](/fine-reader/engine/api-reference/engine-object-iengine-interface)

[StartLogging](/fine-reader/engine/api-reference/engine-object-iengine-interface/supplementary-methods/startlogging-method)

[EnableProcessorLogging](/fine-reader/engine/api-reference/engine-object-iengine-interface/supplementary-methods/enableprocessorlogging-method)

[StopLogging](/fine-reader/engine/api-reference/engine-object-iengine-interface/supplementary-methods/stoplogging-method)