Export.lua engines info

[negocki]

I'm trying to get some data about engines(RPM etc.) in my Export.lua in LuaExportAfterNextFrame function.

local engine = LoGetEngineInfo()

Whenever I try to use that variable all I get is nil value and errors like

attempt to index local 'engine' (a nil value)

 

Are those values restricted somehow? Can TacView interfere with my script?