Golfercab

Hmm, that was weird. I delete the launcher (AGAIN) and re-downloaded it, I made sure the console was up when I started my world and it actually loaded =D. I did see in the console that there were some errors such as getting a recipe for mekkanism, also something about "Call getItem failed" for some items, but the world loaded. By the way, I restarted my computer shortly before opening the world and my computer had to do an update, so I am thinking that somehow helped me? I have to see if the world will continue to work or if this become a problem again. Also, try making sure you have the latest launcher (431) Hopefully your world will start to work again for you. Might be one of those technical difficulties where you take break and it fixes itself. ---I noticed that settings such as sort keys/middle click got reset to their default setting, it put me back into cheat mode, and it restarted the acheivement system

Well, I think my world got messed up because I tried to load it, and it took way to long so I had to get task manager open to exit out. My computer never shut down though. I was having problems with the launcher too at the time. And I still do have trouble with the launcher. after I try to reset the pack, or sometimes I don't even have to try to reset the pack i get this message while trying to open tekkit from the launcher: "An error occurred while attempting to delete 'C:Users(Computer profile name)AppDataRoaming.technicmodpackstekkitmainmodsAdditionalPipes2.3.1-BC3.7.1.jar' from cache:" Maybe this has something to do with us having trouble with our worlds?

I have been having the same problem! I couldn't load one of my worlds, but if I create a new one it works for a little bit then starts to freeze up... but still this one world of mine it will not load. I tried deleting launcher, even the .technic file (I have the world backed up of course). But I think there is still hope because if I copy the world from the .technic save and I put it into my .minecraft (vanilla) save and load the world on vanilla, it flawlessly loads and everything I mined/built is there (with the exception of materials/blocks from other modpacks) I am thinking there must be a conflict with a couple of the mods installed?