Title: KeyMusician Keyboard Won’t Start On Ubuntu 18.04

Detailed Description:

After applying updates on Ubuntu 18.04, the KeyMusician Keyboard application won’t start up anymore. It crashes early in initialization, trying to establish the look-and-feel of the application.

The Java updates that caused this came out toward the end of August, 2018.

The error it gets is:

Exception in thread "main" java.awt.AWTError: Assistive Technology not found: org.GNOME.Accessibility.AtkWrapper

Cause Of Problem:

Unknown.

Work-Around:

Edit the /etc/java-11-openjdk/accessibility.properties file to turn-off “org.GNOME.Accessibility.AtkWrapper” assistive technologies.

Run your systems editor in root mode, editing that file. On Ubuntu, you can do it with the line:

sudo gedit /etc/java-11-openjdk/accessibility.properties

On Lubuntu, you can do it with the line:

sudo leafpad /etc/java-11-openjdk/accessibility.properties

In the editor, go down to the last line of the file (starting with “assistive_technologies”), and insert a “#” character at the beginning of the line, making it a comment-line. Then save the file.

After doing that, you should be able to start up the KeyMusician Keyboard.

Fix Available:

A fix to OpenJava on Ubuntu came out near the end of September, which made the change detailed in the Work-Around section, so you no longer need to do the work-around.