I defined a parametrized build with boolean parameter DO_SONAR (default true) and an ant build and the conditional build step (single) - condition:boolean token:DO_SONAR at thend which calls Invoke STandalon Sonar Analyse if true.
I can see in log the DO_SONAR is set and true, but the conditional build step (single) isn't even called to evaluate nor executed ( i can remember i could see stgh in logs formerly bot now nothing to proof that the plugin does anything.