java exception robotics toolbox

Hi,

I am trying to do the example - Task 3 - Work with Messages Using MATLAB Function Block - at this link

but when I click the MATLAB Function - Assign block I have the following error:

Error calling eml_man(open_editor): Java exception occurred: 
java.lang.NullPointerException
  at com.mathworks.toolbox.eml.EMLEditorApi.documentOpen(EMLEditorApi.java:483)

I am working on Ubuntu 14.04 and the command:

update-java-alternatives -l

gives me :

update-java-alternatives -l
java-1.7.0-openjdk-amd64 1071 /usr/lib/jvm/java-1.7.0-openjdk-amd64

Do you know what could be the problem?

Answer 1

[chef13]

I found the answer to my question. It was rather easy. It was the Java version on my ubuntu 14.04 and the one expected by matlab

You can check, in MATLAB, the version of Java expected in this way:

version -java

Mine was:

'Java 1.8.0_121-b13 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode'

While from the command

update-java-alternatives -l

I had

update-java-alternatives -l
java-1.7.0-openjdk-amd64 1071 /usr/lib/jvm/java-1.7.0-openjdk-amd64

Then to solve the problem I had to update my java and I did it through

sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer

Restart your laptop and it should work.