My first attempt

[SirPeacemaker]

I tried to modify in World builder map from other mod. I did big research about resources on our planet and I placed them where they belong. Same with nations and cities. I like to play it as real as possible. I finished my editor, saved the map and found it in MODS in the game menu. I clicked on load scenario and wanted to start to play. But I have CTD instead. I did something wrong. But what?? Hmmm

 

[Spatzimaus]

First of all, what did your logs say? And FireTuner? FireTuner, especially, will usually say something in that sort of crash.

Beyond that, I know of a few things can crash maps like that.
1> The game tries to place a starting location and fails because it can't find a valid location for at least one civ (including the minor civs). If you used predefined start locations, this'll happen if, for instance, one of the starting locations was changed to mountain or water.
2> There are no units of one resource on the map. Any resource will do this.
3> There are no natural wonders on the map.

I'm sure there are others, but those are the ones I've seen crash things. It's VERY sensitive, so you have to be careful.

 

[SirPeacemaker]

Thank you for your advices. I´m sure there is no colision with starting locations (I made them), I´m sure there is everything from resources (I made big research of world and I placed every single resource where it belong), but I´m not sure about wonders. If they weren´t there with the map, that should be that. Because I didn´t put there any of them.