diff --git a/.github/workflows/github-opengjk-examples.yml b/.github/workflows/github-opengjk-examples.yml
index e262b56..51a5655 100644
--- a/.github/workflows/github-opengjk-examples.yml
+++ b/.github/workflows/github-opengjk-examples.yml
@@ -30,6 +30,4 @@ jobs:
     steps:
       - name: Check out repository code
         uses: actions/checkout@v3
-      - run: ls
-      - run: octave --version
       - run: cd examples/matlab/; octave runme.m
diff --git a/examples/matlab/main.m b/examples/matlab/main.m
index ab555a4..d01445d 100644
--- a/examples/matlab/main.m
+++ b/examples/matlab/main.m
@@ -61,4 +61,6 @@ if(exist('OCTAVE_VERSION', 'builtin') == 0)
        view(42,21)
        % ... add light
        light('Position',[5 -10 20],'Style','local'); 
-end
\ No newline at end of file
+end
+
+error("DOnnnnnt do it again!")
\ No newline at end of file