Handling errors in the assembly

Use the catch section of the assembly to describe the handling of errors thrown during the assembly execution.

To create a catch and include components in it, complete the following steps:

1. In the navigation pane, click Develop.
   The Develop: APIs and Products tab opens.
2. Click the API definition that you want to apply a catch to, and then click the Assemble tab at the top of the Develop API editor.
3. Set the Show catches toggle in the menu bar above the canvas to the Show position.
4. Click Catch at the bottom of the canvas, or a Catch icon if one is displayed.
   The property sheet for the API's catches opens.
5. To add a default catch that is executed when an otherwise uncaught error is thrown, click + Default.
   Note: If you have a default catch above another catch in precedence, the default catch will activate even when the other catch's error is thrown.
6. To add a new catch, click + Catch.
7. To specify which errors the catch applies to, type the name of a custom error and press Enter, or use the search errors field to search for the appropriate error.
8. Optional: To remove an error case from a catch, click the corresponding cross.
9. Optional: To change the precedence of your catches, use the Move up or Move down icons.
   If an error case is handled by multiple catches, the catch at the top of the list is applied.
10. To add a component to a catch, drag the component over the dashed, gray box that appears in the flow from the Catch icon for the catch that you want to apply the component to.
11. Click Save to save your changes.