What is a trigger message?

It means that one of the generator components (e.g. Fixed Rate - http://www.loadui.com/Generators/fixed- ... onent.html) will tell other components (e.g. SoapUI Runner component - http://www.loadui.com/Runners/soapui-ru ... onent.html) how many parallel threads to generate.

But they'd have to be linked in a workflow as described in all the intro articles - http://www.loadui.com/Getting-Started-w ... -test.html

Thanks,
Michael Giller
SmartBear Software