I, and others, have been having an issue with the FMC and installing a route with an approach. Even when getting all discontinuities removed, there is still a 'gap' in the route, usually from the last fix to the IAF or FAF.

By accident, I think I may have found part, if not all, of the problem with broken route segments. It appears that there are approaches in the 757 database that are not in the FSX database, and when trying to use these, the issue arises.

I discovered this when flying into KRNO. I selected the ILS for 34L in the FMC, which also shows in Airnav.com as a current approach. However I have installed a default FSX GPS in the 75, and looking at the approaches in there, this approach isnt listed.

I then loaded the RNAV 34L approach and everything was perfect on the approach. I left the #1 nav tuned to the ILS, and there was no signal recieved at all, so it definatly seems to be problem.

Just thought others might benifit from this and save a lot of time trying to use an approach that FSX doesn't support.