I've been having some issues with a custom modpack recently. I downloaded the latest forge universal version for 1.7.10, renamed it modpack (so it comes across as modpack.jar) and put that in the bin folder. I have my mods in the mods folder, and due to specific configs I wanted, I added the configs folder. Other than this I have the resourcepacks folder and options.txt to automatically load a resourcepack upon launch. However when launching the modpack it only ever opens vanilla minecraft with the resource pack loaded. I don't know what the issue is and was hoping anyone on the forums could help me out!
This has been resolved as of now! I decided to use a method brought up by a response in a different topic and it worked for me, though it wasn't a direct solution to my issue I appreciate those who help people like me with these issues!
