Hi,
it's not possible to create a task query to find all tasks of all versions of a specific process because TaskQuery append a where clause with a = operator and not a like operator
if (processDefinitionId!=null) {
appendWhereClause("task.processInstance.processDefinitionId = '"+processDefinitionId+"' ", hql);
}
may be, it's a good idea to use a like operator instead of = operator and let the developper the possibilty to use the api like that
taskQuery.processDefinitionId("my-process-%");
Best Regards