# CyclicalGraphException class

Namespace: [Grasshopper2.Doc](https://developer.rhino3d.com/api/gh2/namespace/grasshopper2.doc.md) · Assembly: [Grasshopper2](https://developer.rhino3d.com/api/gh2/assembly/grasshopper2.md)

```cs
public sealed class CyclicalGraphException : Exception
```

Exception thrown whenever a cyclical graph is detected. This exception is thrown automatically when an object which is already part of a [CallStack](https://developer.rhino3d.com/api/gh2/type/grasshopper2.doc.callstack.md) is pushed onto the same stack again: RH-68232

## Constructors

- [CyclicalGraphException](https://developer.rhino3d.com/api/gh2/type/grasshopper2.doc.cyclicalgraphexception/ctor.md)