As others have pointed out, MMP8G appears to be the SID for runway 35R so the exact combination above is not valid, you’d need to include MMP 6W or 7W, AFAICT.
Any news? Simbrief is still including the invalid SID as of today.
In addition, when manually selecting the SID (as there may be multiple SIDs leading into the AOS5K transition, for example for runways 17L/17R MMP6W in 2303 but also MMP1R and MMP7W in the current cycle, or simply to avoid any ambiguity), the export is also weird:
If only a transition is supplied in the route option (default behavior, ex. LIMC/17R AOS5K AOSTA DCT MOLUS ...), an initial SID will be auto-selected from the available SIDs for the selected runway and included in the X-Plane export and Navigraph Charts import for compatibility.
You can also specify which initial SID to use by manually typing it into the route, for example: LIMC/17R MMP6W.AOS5K AOSTA DCT MOLUS ....
…17 lines instead of 11 (longer but the previous was already a long mess) and at least presents all and only the valid combinations that terminate at AOSTA.