"Unable to select this object" problem

[Pacific RailRoad]

Sooooooo I've been messing with some maps and the scenario editor , untill I decided to add some mod to a map that I like and I weren't able too add anything (message below popped up) eventhough I haven't added anything yet.

Any Help?

[Zakos]

When you select an object, it automatically selects the other objects that it requires. For instance, that train requires railroad track which will be selected as soon as you select the train; railroad track then requires whatever bridges you have modded in. From just selecting that one item, you selected a total of 6-8 others.

Check what's selected in the other tabs. If you have other mods such as the German station packs or maglev then you may have too many track types or bridges selected.

[Pacific RailRoad]

Ah Right , Thank you.