When making a mod pack like Tekkit...

[Riderj]

Approximately what percentage do you get errors that conflict with the mods that were picked? I've just started to develop a launcher and I want to get some mod packs out there. I just wanted some advice from possibly the most successful modpack launcher.

[disconsented]

Completely Circumstantial.

[discodancepant]

exactly. depends on what mods you plan on installing. some groups of mods have no conflicting block ID/item ID's whatsoever. some do. just depends on what the mod developer decided. Only real way to know if they conflict is to try it out.