[41Sqn_Banks]

Hi, first of all the "GamePlay.gpLoadSectionFile(fileName);" doesn't load the mission file into the game engine. It only creates a ISectionFile object that allows to read/write a mission file with the script and do some changes (like you are already do).

To post load a mission file into the running battle you need to call "GamePlay.gpPostMissionLoad(fileName);"

However I don't think it's possible to change the MAIN parameters by a mission file that is post loaded into a running battle.

Anyhow your script should look something like this:

using System;
using System.Collections.Generic;
using maddox.game;
using maddox.game.world;
using maddox.GP;
using System.Security.Cryptography;


public class Mission : AMission
{

public override void OnBattleInit()
{
      RandomiseMission();
}

internal ISectionFile RandomiseMission()
{

    //time of day
    bool RandomiseTime = true;
    int minTime = 6;
    int maxTime = 17;
    // WeatherIndex
    bool RandomiseWeatherIndex = true;
    int minWeatherIndex = 0;
    int maxWeatherIndex = 1;
    // cloud height
    bool RandomiseClouds = true;
    int minClouds = 1000;
    int maxClouds = 2000;
    // BreezeActivity
    bool RandomiseBreezeActivity = true;
    int minBreezeActivity = 0;
    int maxBreezeActivity = 3;
    // ThermalActivity
    bool RandomiseThermalActivity = true;
    int minThermalActivity = 0;
    int maxThermalActivity = 2;

    ISectionFile f = GamePlay.gpCreateSectionFile();
    string sect;
    string key;
    string value;
    // time of day
    if (RandomiseTime == true)
    {
        sect = "MAIN";
        key = "TIME";
        value = NextInt(minTime, maxTime).ToString();
        f.add(sect, key, value);
	GamePlay.gpHUDLogCenter("Time: " +  value); // for testing
    }

    // WeatherIndex 
    if (RandomiseWeatherIndex == true)
    {
        sect = "MAIN";
        key = "CloudsHeight";
        value = NextInt(minWeatherIndex, maxWeatherIndex).ToString();
        f.add(sect, key, value);
    }

    // clouds
    if (RandomiseClouds == true)
    {
        sect = "MAIN";
        key = "CloudsHeight";
        value = NextInt(minClouds, maxClouds).ToString();
        f.add(sect, key, value);
    }

    // minBreezeActivity
    if (RandomiseBreezeActivity == true)
    {
        sect = "MAIN";
        key = "BreezeActivity";
        value = NextInt(minBreezeActivity, maxBreezeActivity).ToString();
        f.add(sect, key, value); 
    }

    // ThermalActivity 
    if (RandomiseThermalActivity == true)
    {
        sect = "MAIN";
        key = "ThermalActivity";
        value = NextInt(minThermalActivity, maxThermalActivity).ToString();
        f.add(sect, key, value); 
    }

// This post loads the section file f into the current battle.
// It's also possible to save the section file f first by f.save("filename") and then
// call GamePlay.gpPostMissionLoad("filename"); if you want to save the randomised file
// on your hard disk.
   GamePlay.gpPostMissionLoad(f);
 
   return f;

}

private static int NextInt(int min, int max)
{
    RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider();
    byte[] buffer = new byte[4];

    rng.GetBytes(buffer);
    int result = BitConverter.ToInt32(buffer, 0);

    return new Random(result).Next(min, max);
}

}