Design Center Release Notes

1.1 - September 23, 2017

Improvements and bug fixes in flow design are included in this release:


  • This release includes support for IE 11 or later on Windows 7 or 10.

  • DataWeave improvements

    • You can now name input and output data types.

    • The DataWeave editor now supports transforming data to a binary array.

  • Support for Mule 4.0 RC.

Bugs Fixed


1.0.3 - August 26, 2017

API designer bug improvements and bug fixes are included in this release:


  • Added filtering by business group when searching for Exchange dependencies.

Bugs Fixed

  • Fixed a random connection issue with an underlying service (VCS).

  • Fixed an issue with the deletion of special characters from resources that included uriParameters.

  • The autocomplete option is no longer hidden by other components from the UI.

1.0.2 - August 12, 2017

This release includes in-app links to documentation, it also includes bug fixes in several components such as the Choice, Try, and Transform components.

Bugs Fixed

  • For the Choice component, the Default option isn’t shown by default unless the user adds it initially.

  • A parser error occurs when adding a Try card. This is because it’s not made clear that the Type field is required.

  • Missing tooltips on the top (right) toolbar - the following were added: "Download Mule Application" and "Support".

  • Auto completion doesn’t work in the DataWeave function editor.

  • DataWeave unnecessarily underlines the script as having an error.

  • Improve transformer inline function editor error handling in DataWeave. Errors aren’t shown in the DataWeave inline Function Editor because the provided model caused false errors during scoping.

  • The Transform Message component forces you to select a mapping when you shouldn’t have to.

  • Suggestions get cut off in the Choice card.

  • When restarting a workspace, an error is shown before the workspace is created.

  • File leak issue in the Execution Service.

  • Improve Transform component`s performance.

  • Null File-Name error issue in Runtime Manager.

Known Issues

  • The Same limitations from version 1.0.0 apply to this version.

  • Live View for Transform Card is not working when placed before a DataBase card.

  • Dictionary Editor is not working in Windows chrome.

  • Literal arrays can not be edited from function editor in the transform.

  • Web Service Consumer xml validation error leaves application in a failed state.

  • Target Variable is not working for Foreach.

1.0.1 - August 4, 2017

This release included the following improvements:

  • Fix around the Get Started button: it’s hidden when a user has no API Designer entitlement

  • integration fixes

  • 3 minor UI fixes

1.0 - July 29, 2017

This release includes the new web-based Design Center that enables you to easily create web-based integration flows, design API specifications, and create reusable API fragments.

Flow designer

With release you can:

  • Create and manage Mule application projects.

  • Design flows using a simple step-by-step process with the ability to quickly navigate to Exchange to see more information.

  • Connect to systems and protocols using different connectors, including databases, FTP, HTTP, SOAP web services, Salesforce, Workday, and others.

  • Support for REST connect, which provides a connector in the component selector for every API that is published in Exchange. This enables you to discover APIs as part of your design process and consume them without having to know the details of how the API works.

  • Perform complex data transformations using DataWeave with a visual drag-and-drop editor.

  • View live data, so you can easily debug your flows.

  • Create and manage data types for XML, JSON, CSV, and objects.

  • Control the flow of data:

    • Choice Router enables you to make logical decisions and route to specific event processors or other flows.

    • For Each Scope enables you to loop over payload content.

    • Try Scope enables you to incorporate error-handling logic into your flows. Using error handlers, you can select specific error types that could occur, and define a behavior to deal with each.

    • Flow Refs enable you to call out to other flows from your main flow.

  • Store and retrieve information from the Mule Object Store.

  • Use design environments, which enable you to develop applications using flow designer, without consuming your Sandbox VCores.

  • Manage dependencies, so you can control the versions of your connectors and modules, to upgrade or downgrade at any time.

Underpinning this release is the initial release of Mule 4.0 Runtime. This release is currently only available to Design Center users. More details on what’s new in Mule 4 can be found in the Mule Runtime section.

API designer

This release of Design Center enables you to:

  • Edit RAML API specifications and fragments.

  • Publish and consume reusable API fragments, so that common best practices, data types, or security schemes can be reused across APIs.

  • Mock and test APIs.

  • Import and export Open API Specification (OAS) 2.0.

  • Create and delete branches for your API specification or fragment.

  • View projects in edit and read-only mode to avoid conflicts in collaboration.

  • See suggestions and discover RAML syntax via a “shelf” built.

  • Preview your API with the new RAML console.

Browser Compatibility

Browser Version


54.0.x or later


50.0.x or later


10.1.x or later


Version 40.12 or later

Known Issues (Flow designer)

  • Currently the flow fesigner is not supported on IE Browser

  • Exporting to Studio, some DataWeave expressions on fields aren’t exported. Specifically those that reference nested elements using selectors.

  • Metadata: While creating the application, no metadata is resolved until the worker is finally created. Once the application is running, the metadata will be refreshed for existing cards in the flow.

  • Live View does not properly show list of message objects for FTP List operations.

  • Live View - sometimes Consume is not retrieving anything, therefore live view does not show anything

  • Publishing assets to exchange or uploading Drivers. User will need to have exchange permissions. Also a more accurate error is required to be retrieved when not having enough permissions

  • Currently Datasense is not supported for Flow Ref

  • Transform presents some mapping simple types issues

  • Cloning Projects is only available for Mule Applications type projects

  • The validation all operation is not available

  • Project management view does not show correct dates in the project list and in the detail panel

  • Unlock takes 5 min to unlock a project

  • Test connectivity failure causes deployment failure

  • Uploading files for every connector other than HTTP, like keystores or private keys, is not currently supported

Known Issues (API designer)

  • In a Try scope, selecting errors of Type CORE in the error handler doesn’t work.

  • The For Each scope doesn’t support using a target variable as an output.

  • Users cannot move files to a folder via drag and drop in Firefox

  • API Designer does not delete baseUri parameter if header of file is changed to a fragment and mocking server is running