Board Thread:Administrator Noticeboard/@comment-97.91.210.60-20130215235536/@comment-6294495-20130216025947

Other than an error report, you haven't given any information about what happened and what you have tried to fix it.

That said, backup your Saves folder and your Tekkit folder. Delete your Tekkit folder and download a fresh installation of the game from the launcher.

It's a good place to start if you haven't already done anything.

It looks like there's a problem with IndustrialCraft and also something to do with the server. Are you playing on a server, do you host a server or are you playing single player?