Technic mod startup odd error

[elmo]

Hello forumdwellers. I'm dealing with an odd error when I try to run Tekkit via the Technic Launcher.

The exact path for the error is as follows:

I run the Tekkit modpack (v1.2.9d) from the Launcher (build 439). Select Singleplayer, select my world and hit "Play". I see the "Loading world" message, and then I magically return to Technic Launcher with no error message.

 

I'm not sure if this should be under Tekkit bugs, I think its a Technic bug since I get bounced all the way back to the Launcher. Any help is much appreciated.

[plowmanplow]

Yes. You will need to seek help in the Tracker for problems with built-in packs and the Launcher.