---
title: "Canvas..::.callbackException Event"
canonical: https://www.graphicsmill.com/docs/gmwc/E_J_Aurigma_GraphicsMill_AjaxControls_VectorObjects_Canvas_callbackException.htm
archived: true
applies_to:
  - product: "Graphics Mill Web Controls"
---

**You’re viewing documentation for an outdated product.** Graphics Mill Web Controls is no longer part of Graphics Mill. For current design editing and rendering tools, see [Design Atoms .NET](https://customerscanvas.com/docs/on-premises/design-atoms-cs/), [Design Atoms JS](https://customerscanvas.com/docs/on-premises/design-atoms-js/), and [Design Editor](https://customerscanvas.com/docs/on-premises/design-editor/).

# Canvas.callbackException Event

**Applies to:** Graphics Mill Web Controls · **Archived documentation**
 
Fires when the callback threw an exception.
 
**Namespace:** [Aurigma.GraphicsMill.AjaxControls.VectorObjects](https://www.graphicsmill.com/docs/gmwc/N_J_Aurigma_GraphicsMill_AjaxControls_VectorObjects.htm.md)
 **Assembly:** Aurigma.GraphicsMill.AjaxControls.VectorObjects (in Aurigma.GraphicsMill.AjaxControls.dll)
 
## Syntax
  
```
function add_callbackException(value);
function remove_callbackException(value);
```
   
## See Also

### Reference

- [Canvas Class](https://www.graphicsmill.com/docs/gmwc/T_J_Aurigma_GraphicsMill_AjaxControls_VectorObjects_Canvas.htm.md)
- [Aurigma.GraphicsMill.AjaxControls.VectorObjects Namespace](https://www.graphicsmill.com/docs/gmwc/N_J_Aurigma_GraphicsMill_AjaxControls_VectorObjects.htm.md)