Anypoint Studio 6.6 with Mule Runtime Engine 3.9.4 Update Site 4 Release Notes

December 11, 2019
Build ID: 201912101747


Mule runtime engine

Version: 3.9.4 EE

Anypoint Studio

Version: 6.6.4
Build Id: 201912101747


Versions: 3.9.4


Version: 1.2.3


Version: 1.7.4 (munit-studio-plugin)

SAP Connector

Versions: 3.2.1


Versions: 4.7.2

What’s New

The Anypoint Studio 6.6.4 release focuses on bug fixes.

Hardware Requirements

  • MuleSoft recommends a minimum of 4GB RAM on a developer workstation. As applications become complex, consider adding more RAM.

  • 2GHz CPU

  • 10GB free hard drive space

Software Requirements

Java Environments

This version of Anypoint Studio requires AdoptOpenJDK 8 to run properly.

Depending on which Mule runtime engine you want to use, you can configure different JDK versions within Anypoint Studio:

  • Mule 3.9.x requires Studio running on Java 8.

  • Mule 3.5.x requires Studio running on Java 7.

  • Other supported runtime versions work fine with both Java 7 or 8.

Operating Systems

  • MacOS 10.10.0

  • Windows (32- and 64-bit) Windows 7, Windows 8, Windows 10

  • RHEL 7.0

  • Ubuntu 15.04 or later

Running real-time antivirus protection software on your operating system might have a negative impact on Anypoint Studio performance. Although this issue is prominent on Windows, it also occurs on Linux and macOS.

Although the steps to solve these performance issues vary depending on your antivirus software, a typical solution is to either allow or exclude the Anypoint Studio and java executables, the Studio install and workspace filesystem locations, or some combination of both. See examples of solutions for McAfee Viruscan, Windows Defender, and Symantec Endpoint Protection.

Known Issues

There are no known issues for this release.

Migration Guide

Updating your Anypoint Studio version using the update site does not update the bundled version of the Mule runtime engine.
To get the latest Mule version after updating Studio, follow these steps.

When opening a previous workspace with projects that were created with Studio 5.1.0 or older, and which has metadata stored in disk, Studio prompts you to update all the projects so that the Metadata Manager can handle the existing types and show them in your project.

You can easily import all of the external components that you had installed in your old version of Anypoint Studio with a single action. These components include connectors, runtimes, and any other type of extension added through the Anypoint Exchange or the ​Help → Install new software​ menu, as long as there are no compatibility restrictions.

Do this by selecting File > Import and then choose Install > From existing installation.


Then specify the location of your old version of Anypoint Studio in your local drive.

JIRA Ticket List for Anypoint Studio

Bug Fixes

  • Fixed issue where the Studio Ident preferences were not honored.

  • Fixed issue where resizing a tab in the debug perspective permanently closed the Console and Problems tabs.

  • Fixed issue where Studio did not create the reference to a dwl file.

  • Fixed issue preventing Git plugin 5.1.3 to work with Studio 6.5.2 and later.

  • Fixed issue where MEL expressions were not being parsed properly by Studio.

  • Fixed issue preventing Studio from generating JAX-WS Source.

  • Fixed issue where the API console did not appear in Studio 6 for Linux.


No tasks were completed in this release.

Enhancement Request

No enhancement requests were addressed in this release.


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