Error: multiple tasks on the same Event object.

Hello,

Running my code, I've got an error related to this BIOS code (ti.sysbios.knl.event):

   /*!
   312         *  Asserted when {@link #pend} is called by multiple tasks on the same
   313         *  Event object.
   314         */
   315        config Assert.Id A_eventInUse = {
   316            msg: "A_eventInUse: Event object already in use."
   317        };

Could-you explain the exact meaning of this error?

And also, could-you tell-me if there is other BIOS object (semaphore, mailbox, etc.) that could not afford multiple tasks access on the same object at the same time (in preemption I mean)?

My setup:

sysbios 6.31.4.27, xdc 3.20.8.88, ccs5.1

Simon