I have been using ACP Planner in simulation mode. I have just noticed that the longitude values in the plan for the Observatory Location have a "-" in front of them, but am in an eastern location. I have been creating them using TheSkyX linked with ACP Planner.

I am assuming ACP Planner is taking the coordinates of the observatory from TheSKyX? I have checked the location details there and it says the longitude is East.

in ACP preferences itself it is a positive value as well, but that probably has nothing to do with it.

Making a plan manually in ACP without TheSkyX doesn't include the observatory Long/Lat, so I am assuming it is something to do with ACP Planner getting informatjon from SkyX.

Am using ACP Expert; SKyX latest build Sept 2017 Build 11086 for Windows.

I assume it wont cause any actual problem in running the plan but curious as to what might be happening.