POSIX timer_create

[Richard M. Barry]

When I call timer_create in my code, I get a errno=EINVAL.  According to the timer_create man page, this means the timerid I used was invalid, but I used CLOCK_REALTIME, so it should be fine.  Earlier in the code I set the clock, and it gives me the correct time when I red back the time, so I'm assuming the clock works.  What am I missing? The call to timer_create is below:
 
status = timer_create ( CLOCK_REALTIME, &Procs.event, &Procs.timer_id );

if( status == -1 )
{
  syslog( LOG_INFO, "Could not create a timer);
        switch (errno) {
           case EAGAIN : printf("errno=EAGAIN\n");break;
           case EINVAL : printf("errno=EINVAL\n");break;
           case ENOSYS : printf("errno=ENOSYS\n");break;
           default : printf("Unknown error\n");
   }
}