Ugdhar

Look for "targetCompatability" in your build.gradle, see if you can change it to 1.8 there.

This link has a great example of using registry events to register stuff.

I also see net.minecraftforge.fml.common.MissingModsException: Mod twilightforest (The Twilight Forest) requires [forge@[14.23.0.2501,)] And you're running forge 14.23.0.2491

Please upload your code to a github (http://www.github.com), we're going to need to see pretty much every class because everything in your code calls/references something else, and we need to see how it fits together to see where your null is.

Post your entire fml-client-latest.log file in spoiler tags please

You made your main mod class abstract, so it can't be instantiated.

1.7.10 is no longer supported here, you will need to update to get help here.

Post the full fml-client-latest.log, the bit you pasted doesn't have any real info or even a crash in it. Use spoiler tags (the eyeball button)

Are you building your jar with gradlew build? Beyond that, you'll probably need to post code, as despite checking it twice, there is still something that must be wrong since it doesn't work, and more eyes could help find it.

1.7.10 is no longer supported here, you will need to update to get support.

Did you build your mod jarfile using gradlew build? How did you install the forge server files?

1.7.10 is no longer supported here, you will need to update for help.

Post your fml-client-latest.log file, it should have information to help figure out what's wrong.

Post a screenshot of your mods folder, as well as fml-client-latest.log so we can see what's goin on

I would (in fact I did) just get a free dynamic DNS setup. http://www.noip.com lets ya get up to 3 for free, all you have to do is confirm you're still using it every 30 days. I've seen hamachi mentioned before, but never used it, so no idea how to fix it.

Any reason you're not using 1.10.2? I believe there were a lot of bug fixes between 1.10 and 1.10.2. Unfortunately, I have no idea looking at that log what is wrong, is there a crash report or anything as well?

Do a bit of reading on variable scope. You can't declare a variable in one method, and have it accessible in another method.

Post your code to github and link to it here for more help, are you setting the registry name in your ItemStraw? edit: also when posting a long error report like that, you should use the spoiler tags.

Where are you registering this event on the event bus? What does it do when you run it? Do you ever make it to that inside condition where you're attempting to add the drops? Does the fml-client-latest.log say anything?

I would also not use a # in my modid (I'm not sure, but I would bet special characters are prohibited), and modids need to be all lowercase.

That's just silly. Your log shows us all the mods you're using anyway lol. Anyway, I would hazard a guess that it has something to do with Extra Utilities, since I see it mentioned in the crashlog. Try removing that and seeing what happens.

If you're going to use 1.8, you should use 1.8.9, but really you should update to at least 1.11.2.

You need to update, 1.7.10 is no longer supported.

I believe the problem is the mod Logistics Pipes is for 1.7, not 1.12.2. Remove that mod and try again

Sure just don't create/register an ItemBlock for the block in question. That should do it I believe.