UIB error Event mapping target action is undefined

[Aman18]

Hi,

I have built a custom page and added Calendar component. Also added a custom modal to open the event record when clicked. Using Client state parameter to pass on the parameter from event id to the form controller using event clicket action. It is working as expected in lower instance.

But after migrating the code to higher instance modal is not opening and getting below error:

"getActionHandlers.js:348 Event mapping target action is undefined"

I have pushed the code multiple times capturing all the components again to be sure not missing any code. but still not working. Any idea why it's not working?

Thanks,

Aman

[Community Alums]

hi @Aman18 ,

Here's a summary of potential steps to troubleshoot your issue:

Check for Missing Dependencies: Ensure all related scripts and components are migrated correctly.

Verify Client State Parameters: Confirm they are correctly set and passed.

Check for Script Errors: Look for additional errors in the browser console.

Review ACLs and Permissions: Ensure proper access controls and permissions.

Compare Configurations: Identify any discrepancies between the lower and higher instances.

Clear Cache and Rebuild Scripts: Resolve issues from cached old data or scripts.

Debug with Logging: Trace execution flow to identify failure points.

Review getActionHandlers.js: Understand the cause of the "undefined" error.

Check Event Handlers: Ensure correct definition and mapping of event handlers.

Instance-Specific Issues: Consider involving ServiceNow support if needed.

Thanks,

Hope this helps.

If my response turns useful, please mark it helpful and accept solution.

[gustavlait]

A bit late but, we ran into a similar issue after moving a button from lower instances to PROD. The button triggers a Data Resource, which then opens a new page via a "link to destination". In PROD this completely stopped working, and the browser console showed the error: “event mapping target action is undefined.”

We initially compared all event mappings on the page level and they looked identical between environments. The real discrepancy showed up when we checked the UX Macroponent Definition. The dispatched events there differed between DEV and PROD. What’s odd is that when you update or move a UX macroponent in UI Builder, the whole definition is moved, yet the dispatched events didn’t come across correctly.

In the end, we resolved this by simply updating the two dispatched events that differed in PROD. Either making a small change to them or promoting them via XML so they were identical to the sub-environments fixed the issue. Once the dispatched events in the UX Macro Component Definition matched across environments, the button and its events started working as expected.