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Delete duplicate mod. If you can not find in a launcher, then find and delete from your minecraft mod folder
These are:
TConstruct_1.6.4_1.5.1.jar
ThaumicTinkerer 2.0-38.jar
Yeah that really helped thanks all i had to do was delete my ftb folder in my appdata folder why this happened i have not idea after the pack updated but thank you very much.