Hello. Has anyone had success with using the vnav function in the G1000 of the TBM? I've read the manual (particularly pages 84-87) and everything seems right until I hit the vnav button and I receive the following message: "vnv not possible for this approach". Also, I get the VNV annuciator, the vnav target window, but not the vertical dev. indicator. Happens every time. Any help would be appreciated. Thanks!