# Class ActivityNotFoundException

OptimaJet.Workflow.Core.Fault.ActivityNotFoundException

Represents an exception thrown when an activity-related item cannot be found in a workflow scheme.

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

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

## Type Hierarchy

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

## Constructors

`public ActivityNotFoundException(string message)` 

Initializes a new instance of the [ActivityNotFoundException](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Fault/ActivityNotFoundException/) class with a custom error message.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `message` | `String` | The message that explains why the exception was thrown. |

`public ActivityNotFoundException(string activityName, string schemeCode)` 

Initializes a new instance of the [ActivityNotFoundException](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Fault/ActivityNotFoundException/) class for a missing activity name in a specific workflow scheme.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `activityName` | `String` | The name of the activity that was not found. |
| `schemeCode` | `String` | The workflow scheme code that was searched. |

`public ActivityNotFoundException(string stateName, bool? isForSetState, string schemeCode)` 

Initializes a new instance of the [ActivityNotFoundException](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Fault/ActivityNotFoundException/) class for a missing activity state in a specific workflow scheme.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `stateName` | `String` | The name of the state that was not found. |
| `isForSetState` | `Nullable<Boolean>` | Optional value included in the generated message when present. |
| `schemeCode` | `String` | The workflow scheme code that was searched. |

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