rt_task_init_schmod() failure reason?

[Aref Taidi]

Hello everyone,

I am having difficulty finding out why a call to rt_task_init_schmod() fails
and returns NULL. 

I have many user space hard real-time threads, but one of them fails to
initialise when I make a call to rt_task_init_schmod(). The threads are of
various priority order, call to the above function to initialise each are
made not necessarily in their priority order, but always in the same
sequence. All have unique 6 letter name, there is plenty of memory. But
always same thread initialisation failed. I changed the name of that thread,
it caused another one to fail!

Is there a technique to find out exactly why rt_task_init_schmod() has
returned NULL?

Many thanks in advance,

Aref