delete task that does not exist

I am using the RL-RTX Kernel

What I am trying to do is delete a task before it is created.

As I understand the docs for os_tsk_delete
it should return OS_R_NOK if the task cannot be deleted.

For some reason the Kernel gets stuck in the idle task.

Here is some code:

if (os_tsk_delete (id_BiasSupply) == OS_R_OK) {
   /* task deleted */
   id_BiasSupply = os_tsk_create (BiasSupply, 1);
   SetBiasSupplyTenthVolts (0, 10);
} else {
   /* Task not deleted */
   id_BiasSupply = os_tsk_create (BiasSupply, 1);
   SetBiasSupplyTenthVolts (0, 10);
}

In the Keil simulator the statement:
id_BiasSupply = os_tsk_create (BiasSupply, 1);
never gets executed the kernel just stays in the
idle task. Any ideas?

The reason that I want to do this is that I want to make sure that more than one instance of the task is not running at the same time. So I want to just delete the task and if the delete fails then I can go ahead and create the task.