Here is another logs show the error.
 
********* FSUIPC4, Version 4.957b (26th September 2016) by Pete Dowson *********
Windows version reported as 6.2.?.9200
fsx.exe version = 10.0.62615.0
Reading options from "D:\Program Files (x86)\Steam\steamapps\common\FSX\Modules\FSUIPC4.ini"
Running inside FSX Steam Edition on Windows 8.0 or later
Module base=535B0000
User Name="*****"
User Addr="*****"
FSUIPC4 Key is provided
WIDEFS7 not user registered, or expired
       63 System time = 05/11/2016 10:05:59
       63 FLT path = "C:\Users\Billy\Documents\Flight Simulator X Files\"
       79 ------ Module Version Check ------
       79        acontain.dll: 10.0.62615.0
       94             api.dll: 10.0.62615.0
       94        controls.dll: 10.0.62615.0
      110      fs-traffic.dll: 10.0.62615.0
      110             G3D.dll: 10.0.62615.0
      110        language.dll: 10.0.62615.0
      110            sim1.dll: 10.0.62615.0
      125        visualfx.dll: 10.0.62615.0
      125         weather.dll: 10.0.62615.0
      125          window.dll: 10.0.62615.0
      125 ----------------------------------
      563 Trying to connect to SimConnect Steam ...
      641 FS path = "D:\Program Files (x86)\Steam\steamapps\common\FSX\"
      813 ---------------------- Joystick Device Scan -----------------------
      813 Product= Saitek X52 Flight Control System
      813    Manufacturer= Saitek
      813    Vendor=06A3, Product=075C (Version 1.16)
      813    Serial Number= Saitek
      813 -------------------------------------------------------------------
      875 LogOptions=00000000 00000001
      875 -------------------------------------------------------------------
      875 ------ Setting the hooks and direct calls into the simulator ------
      875 --- CONTROLS timer memory location obtained ok
      875 --- SIM1 Frictions access gained
      891 --- FS Controls Table located ok
      891 --- Installed Mouse Macro hooks ok.
      891 --- Wind smoothing fix is fully installed
      891 --- SimConnect intercept for texts and menus option is off
      891 --- All links checked okay
      891 -------------------------------------------------------------------
      891 SimConnect_Open succeeded: waiting to check version okay
      891 Trying to use SimConnect Steam
      891 Opened separate AI Traffic client okay
     6938 Running in "Microsoft Flight Simulator X", Version: 10.0.62615.0 (SimConnect: 10.0.62615.0)
     6938 Initialising SimConnect data requests now
     6938 FSUIPC Menu entry added
     6969 c:\users\billy\documents\flight simulator x files\TEst.FLT
     6969 D:\Program Files (x86)\Steam\steamapps\common\FSX\SimObjects\Airplanes\POSKY Boeing 777-200 FSX\Boeing 777-200-PW4074.air
    16907 Weather Mode now = Theme
    27313 Weather Mode now = Real World
   277313 Weather Mode now = Custom
   357829 C:\Users\Billy\Documents\Flight Simulator X Files\IFR Hong Kong Intl to Chiang Kai Shek Intl.PLN
   487860 Aircraft="Boeing 777-200-PW4074 Project Opensky JAS Rainbow Seven YU JA007D"
   487860 System time = 05/11/2016 10:14:07, Simulator time = 07:55:00 (00:55Z)
   495829 Starting everything now ...
   496500 Advanced Weather Interface Enabled
  1680047 **** Restarting traffic scanning due to non-reception ****
  6877797 Sim stopped: average frame rate for last 6386 secs = 22.6 fps
  6877797              Max AI traffic was 114 aircraft
  7681797 Sim stopped: average frame rate for last 801 secs = 12.5 fps
  7681797              Max AI traffic was 31 aircraft
  7691735 C:\Users\Billy\Documents\Flight Simulator X Files\IFR Hong Kong Intl to Chiang Kai Shek Intl.PLN
  7691735 C:\Users\Billy\AppData\Roaming\Microsoft\FSX\Previous flight.FLT
  7704500 System time = 05/11/2016 12:14:24, Simulator time = 10:53:54 (02:53Z)
  7704500 *** FSUIPC log file being closed
Minimum frame rate was 6.9 fps, Maximum was 30.0 fps
Minimum available memory recorded was 1604Mb
Average frame rate for running time of 7188 secs = 21.4 fps
Maximum AI traffic for session was 114 aircraft
Memory managed: 6442 Allocs, 6442 Freed
********* FSUIPC Log file closed ***********