Cant disable Mystcraft instabilty without crashing?

[Kaz!]

http://pastebin.com/gXH8ib0J
Change the setting to false it crashes gives me that error ^
Set it back to what it was its fine...?

 

[Wabbit]

2012-11-19 21:33:54 [SEVERE] Encountered an unexpected exception IllegalArgumentException
java.lang.IllegalArgumentException: Slot 204 is already occupied by xcompwiz.mystcraft.BlockStarFissure@7ac0e5f9 when adding portalgun.common.block.BlockPortalMod@e3a7d65

Well there's your problem. You got an ID conflict.

 

[Kaz!]

Its not that, because it works fine when on true. Turn it to false and you get that like stated above.

Anyhow i have fixed it. Was down to how the file is read by the FTB modpack got nothing to do with ID conflicts its a simply change and now it works.

 

[Wabbit]

Then turning it false must cause the conflict?

 

[Kaz!]

Yes and no, its down to how the .txt file is read you change that then the issue is resolved i now have it on false and no crashing.