# Class ColumnNotExistsException

OptimaJet.Workflow.Core.Fault.ColumnNotExistsException

Represents an error indicating that a requested column does not exist.

Namespace: [OptimaJet.Workflow.Core.Fault](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Fault/)

```csharp
public class ColumnNotExistsException : Exception, ISerializable
```

## Type Hierarchy

-   [Exception](https://learn.microsoft.com/dotnet/api/system.exception)
    -   ColumnNotExistsException Current type
        -   Implemented interfaces
            -   [ISerializable](https://learn.microsoft.com/dotnet/api/system.runtime.serialization.iserializable)

## Constructors

`public ColumnNotExistsException(string columnName)` 

Initializes a new instance of the [ColumnNotExistsException](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Fault/ColumnNotExistsException/) class.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `columnName` | `String` | The name of the column that was requested but could not be found. |

[Previous CodeActionAlreadyExistsException](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Fault/CodeActionAlreadyExistsException/) [Next CommandAlreadyExistsException](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Fault/CommandAlreadyExistsException/)