evl_demote_thread() leaves dev file of the tread

["Steub, Peter" <Peter.Steub@baumueller.com>]

In my application I have a fallback solution to kill a oob thread, if the regular way of closing the thread fails and a timeout runs out. 
I do this by calling evl_demote_thread() and pthread_cancel() afterwards. This seems to work, evl_demote_thread() gives me a 0 returnvalue, and the thread is gone after pthread_cancel(). 

When I create a new thread, and try to put it in oob mode with the same name using evl_attach_self(), I get EEXIST (-17) from evl_attach_self().
Am I doing it wrong? Is there another way to do a detach from outside the thread? Do I need to do something more then evl_demote_thread() to really get rid of the thread?

I am on evl 0.52 right now.

Thank you.

Mit freundlichen Grüßen / kind regards

i. A. Peter Steub