LexManos

When developing any program, it is a good habit to get into to actually READ the error log that it has give you. If you would do that then you could solve your own issue. As it literally tells you the issue that you are having. And what you need to do to fix it.

Interreacting with entities works just fine in Forge. Remove all your mods and figure out which one it is.

1.12 is no longer supported on this forum. Please update to a modern version of Minecraft to receive support.

This is know, and this is due to Mojang/Java/Windows/Macs/3rd party launchers/gradle/.../... not supporting this feature. It would break every old install if we did that. We've already looked into it.

Honestly, I would advise you remove whatever this ISM mod is and never use it again. Its obfuscated which means it can be doing anything and you have no idea. It also appears to be running a separate process for itself... which again is shady as hell. Beyond that it's broken and throwing NPEs. So ya.. remove that mod. And personally, i'd say never use it or anything made by that author again until they go open.

The game wont think anything. And you can make your conditional be anything you want. So no it doesnt matter.

You can also use conditionals, However empty tags are probably the best way to go. Data gens make any argument of being hard to use moot. So there is nothing we need to do in this reguard.

Some zip managers like to take control of the .jar file extension away from Java. Make sure you have Java installed and try running Jarfix once, then try the installer again.

Some zip managers like to take control of the .jar file extension away from Java. Make sure you have Java installed and try running Jarfix once, then try the installer again. Also, 1.12 is out of support, update.

1.7 is no longer supported on this forum. Please update to a modern version of Minecraft to receive support.

It's not. It's EXPLICITLY not endorsed by us. It's a shitty random project that has decided to steal the MCP name and pretend to be a legit project. We didn't "help create" it. It just stole our tools and used them specifically for what we told them not to be used for. It's a lazy project that actively tries to move our community back 8 years and does nothing but cause confusion and waste our time by tricking people like you into bugging us. Nobody should be using it. MCP is dead. Let it stay dead.

Nope, Vanilla deletes unknown data. Your only hope is to have a backup somewhere. This is why we tell people not to mix vanilla/modded installs.

That's fine, there is someone working on updating the old installers. But its a stupid low priority as people should be using modern versions. As for things pointing at maven central, yes we need to move those to our server but again stupid old versions are low on the priority list. So... This comes into the case of, nobody really cares and if you care enough, help out the guys who are working on it. Until then you can manually download any necessary files.

I understand your intention, that is not supported here. Yes explicitly things like Badlion/Lunar. Shipping full 'client's is against Mojang's EULA, specifically the distribution of wholesale parts of their code. Combined with the scummy anti-user practice of having them enter their credentials into random 3rd party 'clients' We are Forge. Make a Forge mod. That's the only answer you're gunna get.

First off, don't. Config based registry entries are EXPLICITLY designed to be a PITA because you SHOULD NOT be doing it.