Unable to open modpacks

[thetruescuba]

Whenever I click play on any modpacks I've installed, it doesn't open. It does all the normal loading procedures, but then suddenly it stops. I increased the Java memory from 2GB to 3.5GB, but that didn't work either. 

I've posted the link to my logs below. Please help.

https://pastebin.com/x2KKunLW

[JaariAtmc]

You do not have 3.5 GB RAM available to allocate. Besides, that's pixelmon, no support for that here. Go bother the pixelmon community.