Ugdhar

Try disabling the loading screen as described in the EAQ, see if that helps.

Did you try removing/disabling foamfix yet? If not, I'd probably try that and see if it helps.

1.7.10 is no longer supported on these forums due to it being super old. You will need to update to a more recent version (1.10+ I believe) to receive support here.

Have you tried running it without the gui? The one time I ran the server with a gui, it made things run slow, so if you haven't, try it without it.

I would try removing the netherrocks mod and see if it still crashes.

It means you're trying to load a client class on the dedicated server. It likely ran fine playing single player, because the client and server are physically the same (but not logically), but once you move the mod to a dedicated server, this will happen. The link about sides that Cadiboo posted should help explain it more.

If you remove that mod, does it still crash? If so, post new crashlog plz

I would say that mrcrayfish furniture mod is trying to access client classes from the dedicated server, probably need to remove it/report it to the mod author.

https://vazkii.us/p/a-semi-technical-explanation-of-why-you-shouldnt-allocate-too-much-ram-to-minecraft/

Your ClientProxy is not derived from CommonProxy, so it cannot be stored in that field, and you also do not tell the @SidedProxy which class to use as the ClientProxy.

You should show what you tried, people are more likely to help debug some already written code than to write some up for you

That log shows 3G ram for minecraft, were you trying a lower setting to see if it helped?

I see exceptions being thrown from applied energistics, have you tried it without that mod? If it works after removing, report the problem to the mod author.

After you've run gradlew build, your jar file will be found in the build/libs directory in your project directory.

Unfortunately, 1.7.10 is so old, it is no longer supported on these forums. You will need to update to a more recent version to receive support.

Correct. After you do that, reinstall forge and see if it works.

I searched these forums for "unknown version" (including the quotes), and it seems you need to run vanilla 1.12.2, then uninstall/reinstall forge. Give that a try, hope it works!

If you don't have logs at least post a screenshot of the crash or something. And I've /never/ seen an error saying "has things from other versions". . .if you're going to quote an error without a log or screenshot, make sure you quote it 100% accurately. Also, where did you download forge from? Hopefully it was files.minecraftforge.net We have nothing to go on, so there's no way anyone could help you with just this information!

This shows a max of only 1G allocated. Post a log where it crashes where you allocate 4G.

1.7.10 is really really old, and no longer supported on these forums. If you want support here, you will have to update to a more recent version.

1.7.10 is really really old, and no longer supported on these forums. You will need to update to a more recent version to receive support.

I would go right for 1.12.2, latest and greatest!

1.7.10 is very old and no longer supported on these forums. You will need to update to a more recent version for support.

1.7.10 is really old, and no longer supported on these forums. You will need to update in order to receive support.

I searched the forums for "libraries failed to download", and this is the first result (after your post that is) http://www.minecraftforge.net/forum/topic/65042-these-libraries-failed-too-download/?tab=comments#comment-308666 A possible solution is presented there.