Modpacks close after loading

[tkl1234567890]

I need help with an issue my friend is having with his new Technic launcher. We can start it just fine, but after its done loading, the modpack will display a blank screen, and then close automatically. Does anyone have an idea what might be causing this? Thanks

[Edthesheep]

I have the same problem too. I'll click launch and the window will open, but after FML sets up everything closes; it never works.

[NIck Truesdell]

Yes I'm having the same exact problem! Can someone please help.

[YOUGETSNIP3D]

I too am having the same problem, but i know the cause to the problem. Everyone here is trying on a mac. I have no idea why macs will no longer run tekkit or any other mod pack. it was working for me and my bro at first, but then it just randomly started happening and we can't get it fixed. Please Help, someone.

[planetguy]

Manually update LWJGL?

[YOUGETSNIP3D]

I found out how to fix the crashing modpacks (updates failing). When you start up the launcher, go to the settings icon, then allocate 1.5 GB of ram and increase PermGen Size. Save, and then restart your launcher and the problem should be fixed! Enjoy!

[tkl1234567890]

tried it. it worked for a little, but when i restarted my computer, it stopped working. I will try reinstalling the pack.