SimConnect_RequestFacilitiesList (and related) do not return frequencies for VORs and NDBs

[MSFS 2024] Bug Reports SimConnect
1

Version: SimConnect SDK 1.5.7

Connected to SunRise version 12.2
  build 282174.999
  using SimConnect version 12.2
  build Unknown

Frequency: Consistently

Severity: High (Workaround using RequestFacilityData, for each individual VOR/NDB)

Marketplace package name: N/A

Context: Requests using SimConnect SDK

Similar MSFS 2020 issue: None found.

Bug description:

When requesting a list of VORs or NDBs using SimConnect_RequestFacilitiesList, SimConnect_RequestFacilitiesList_EX1, or SimConnect_Request_AllFacilities, the resulting data will return 0.0 as frequency for all beacons. For example:

C:\dev\Dutch FlightSim Developer\developing-with-simconnect\out\build\windows-clang-debug-tests\part-9\9-4 - MSFS 2024 List airport parkings>.\9-4-MSFS2024-List-airports-parkings-in-CXX.exe --region=EH --type=vor --scope=cache
Listing all VORs in region 'EH':
- DKY  :   52.918°N,   4.775°E, MagVar   1.90°W, Alt      1ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- HDR  :   52.907°N,   4.766°E, MagVar   2.42°W, Alt      0ft,   0.000 MHz [    DME       ] (Region EH)
- GRO  :   53.110°N,   6.558°E, MagVar   1.88°W, Alt     12ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- LWZ  :   53.233°N,   5.772°E, MagVar   2.49°W, Alt      3ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- WOL  :   53.228°N,   5.772°E, MagVar   2.99°W, Alt      2ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- LWO  :   53.218°N,   5.735°E, MagVar   2.51°W, Alt      3ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- LOB  :   53.228°N,   5.738°E, MagVar   3.01°W, Alt      2ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- LWD  :   53.224°N,   5.752°E, MagVar   3.00°W, Alt     13ft,   0.000 MHz [    DME       ] (Region EH)
- EEL  :   53.164°N,   6.667°E, MagVar   2.00°W, Alt      0ft,   0.000 MHz [NAV DME       ] (Region EH)
- KAG  :   52.307°N,   4.785°E, MagVar   1.93°W, Alt    -10ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- ZWA  :   52.300°N,   4.737°E, MagVar   1.21°W, Alt    -11ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- VPB  :   52.326°N,   4.709°E, MagVar   1.20°W, Alt    -12ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- SCH  :   52.299°N,   4.781°E, MagVar   1.26°W, Alt    -13ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- BVB  :   52.317°N,   4.744°E, MagVar   0.82°W, Alt    -11ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- MSA  :   52.334°N,   4.740°E, MagVar   1.21°W, Alt    -11ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- ABA  :   52.324°N,   4.780°E, MagVar   1.25°W, Alt    -10ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- ILSN :   52.462°N,   5.530°E, MagVar   1.54°W, Alt    -12ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- AMS  :   52.333°N,   4.706°E, MagVar   2.41°W, Alt      0ft,   0.000 MHz [    DME       ] (Region EH)
- FRO  :   52.452°N,   5.508°E, MagVar   2.66°W, Alt      0ft,   0.000 MHz [    DME       ] (Region EH)
- PAM  :   52.335°N,   5.092°E, MagVar   2.53°W, Alt      0ft,   0.000 MHz [    DME       ] (Region EH)
- SPL  :   52.332°N,   4.750°E, MagVar   2.00°W, Alt      0ft,   0.000 MHz [NAV DME       ] (Region EH)
- SPY  :   52.540°N,   4.854°E, MagVar   2.45°W, Alt      0ft,   0.000 MHz [    DME       ] (Region EH)
- DNS  :   52.046°N,   5.865°E, MagVar   2.72°W, Alt    157ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- DLN  :   52.057°N,   5.873°E, MagVar   3.00°W, Alt    157ft,   0.000 MHz [    DME       ] (Region EH)
- RKN  :   52.133°N,   6.764°E, MagVar   3.04°W, Alt    100ft,   0.000 MHz [    DME       ] (Region EH)
- ROS  :   51.964°N,   4.458°E, MagVar   1.10°W, Alt    -13ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- RSV  :   51.951°N,   4.424°E, MagVar   1.12°W, Alt    -15ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- WDZ  :   51.454°N,   4.362°E, MagVar   1.35°W, Alt     38ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- WDO  :   51.445°N,   4.324°E, MagVar   1.38°W, Alt     62ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- RTM  :   51.974°N,   4.481°E, MagVar   1.00°W, Alt      0ft,   0.000 MHz [NAV DME       ] (Region EH)
- WDT  :   51.447°N,   4.344°E, MagVar   2.00°W, Alt     93ft,   0.000 MHz [    DME       ] (Region EH)
- EHZ  :   51.463°N,   5.388°E, MagVar   1.99°W, Alt     73ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- EHO  :   51.437°N,   5.360°E, MagVar   2.01°W, Alt     66ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- GZO  :   51.570°N,   4.909°E, MagVar   1.03°W, Alt     35ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- EHV  :   51.448°N,   5.375°E, MagVar   3.00°W, Alt    100ft,   0.000 MHz [    DME       ] (Region EH)
- FRT  :   52.004°N,   4.769°E, MagVar   2.44°W, Alt      0ft,   0.000 MHz [    DME       ] (Region EH)
- GZR  :   51.566°N,   4.934°E, MagVar   2.00°W, Alt     45ft,   0.000 MHz [    DME       ] (Region EH)
- VLZ  :   51.665°N,   5.728°E, MagVar   2.08°W, Alt     71ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- VLO  :   51.649°N,   5.688°E, MagVar   2.10°W, Alt     61ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- VKL  :   51.655°N,   5.707°E, MagVar   2.00°W, Alt     83ft,   0.000 MHz [    DME       ] (Region EH)
- BKZ  :   50.922°N,   5.781°E, MagVar   1.62°W, Alt    365ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- BKN  :   50.899°N,   5.757°E, MagVar   1.64°W, Alt    370ft,   0.000 MHz [NAV DME LOC GS] (Region EH)
- MAS  :   50.972°N,   5.960°E, MagVar   3.00°W, Alt    300ft,   0.000 MHz [NAV DME       ] (Region EH)

Cache, bubble, or all makes no difference.

Note: SimConnect_RequestFacilitiesList and SimConnect_RequestFacilitiesList _EX1 appear not to return anything if the user is still in the menu, not even an empty list.

Repro steps: See example.

Attachments: See Example 9-4.

Private attachments: N/A

2

Hi

Looking at your sample project, it seems that there is a casting error.

Your VorDetails struct (that is directly casted from the SIMCONNECT_DATA_FACILITY_VOR struct) uses the frequency as a float, but the original struct uses a DWORD.
Casting those DWORD in a float (in this case) produces very small numbers which are then divided by 1’000’000.0F to be converted. That’s why you get 0s in your sample app.

About your note, I could not reproduce this behavior and could use SimConnect_RequestFacilitiesList in the menu just after the boot. Is it still an issue? Did you do something special to get this behavior?

Best Regards
Maxime / Asobo

3

Ok, that casting error slipped by, my apologies. Just making the field (for both NDB and VOR) unsigned long indeed fixes it.

About the note: Start MSFS 2024 fresh, click “Start”, then leave it in the main menu. Make sure you have not first selected a (free) flight. Now, if (for example) you request bubble or cache scoped VORs, there is no response. I’ll agree there actually isn’t anything to return… yet, but then I’d expect a single empty list returned. Not returning anything is unexpected.

Cheers,
Bert

4

Closing this as obsolete as the frequency issue was identified and we cannot replicate the issue with no VOR list being returned when your 9-4 sample is run from the main menu after boot.

Regards,
Sylvain