EXAMPLE error on publicserver

Hi, there :

     When I try to execute "https://www.knime.org/nodeguide/data-access/data-generation/generating-data-sets-containing-association-rules", it stops at the last node "find rules / frequ. items" with an yellow exclamation mark,whrere can I find the explanation?


It is not an error, it is only a warning. You can see the warning message if you mouse over the sign.