TechNote

Error: "method is unknown for mx.core:UIComponent" when compiling custom Form Guide in Flex Builder

Issue

---

When compiling your custom Form Guide code in Adobe Flex Builder, you may receive the following error:

• Method is unknown for mx.core:UIComponent

Reason

---

You have not disabled strict type checking for your Flex Builder project, so it is matching the wrong definition for the wrapper class.

Solution

---

Disable strict type checking.

1. In Flex Builder, right-click your Flex project from the hierarchy on the left.
2. Click Flex Compiler.
3. Deselect the Enable Strict Type Checking option.
4. Click OK.

Additional Information

---

For customizing Form Guides using Flex Builder, please follow the "Customizing Form Guides Using Flex Builder" guide available here under the section "Creating form guides."

Search Support

---