"Negative i dex request" in X-Plane 11.00pb6 FMC Cannot be Cleared

Question

I was trying to land the default B738 at KMSP but had a missed approach. After problems reentering the STAR got a "negative i dex" message in fmc scratchpad that could not be cleared.
I have a video of what I did and the results.
https://www.youtube.com/watch?v=onX1UP89UJI&t=331s

Answer 1

This has happened to me on every plane with the default FMS CDU.  I sent a bug report.  Try loading your departure before entering the cruise alt, at least selecting the runway.  I've found that if I put in departure airport and destination airport and then cruise level, the bug appears.  But I just tried loading a route from the route menu and then set DEP/ARR runway and the bug stays hidden.  

I'm using ver 11.30 beta4