QMS GetTaskStatus returns null

[#1]

Hi there,

I'm using the QMS API to get the task status - it works fine for DocumentTasks:

   TaskInfo task = client.FindTask(distService.ID, TaskType.DocumentTask , "Some DocumentTask");

   TaskStatus status = client.GetTaskStatus(task.ID, TaskStatusScope.All);

When I do the same for ExternalProgramTask or DBCommandTask the GetTaskStatus-Method returns null:

   TaskInfo task = client.FindTask(distService.ID, TaskType.DBCommandTask , "My DB Command Task");

           --> returns a valid task.ID

   TaskStatus status = client.GetTaskStatus(task.ID, TaskStatusScope.All);

         --> returns status == null

How do I get the task status of a Non-DocumentTask via QMS API?               

Regards

Stefan