Is the `\summon` command broken?

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Based on this video. I tried to make this kind of rocket launcher for my mini game.

I Used this command:

/execute @e[type=Snowball] ~ ~ ~ /summon Fireball ~ ~ ~ {Motion:[0.0,0.0,0.0],direction:[0.0,0.0,0.0]}

but I got:

unable to summon object.

I used the 15w51b snapshot. I think I also tested this a while back in 1.8 but i can't remember if it worked

minecraft-java-edition minecraft-commands

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How do I use the Summon command in Minecraft?

The command for summoning is pretty simple. "/summon mob". Players just need to fill in the mob name, though there are a few exceptions. The command remains the same for both Minecraft Java and Bedrock Edition, and is one of the simplest to use.

How do you summon a creeper on a player?

How to Enter the Command

Open the Chat Window. The easiest way to run a command in Minecraft is within the chat window.

Type the Command. In this example, we are going to summon a creeper in Minecraft Java Edition (PC/Mac) 1.18 with the following command: /summon creeper.

How do you summon a player in Minecraft?

You can summon an entity (or mob) whenever you want using the /summon command in Minecraft....Summon Command in Minecraft Java Edition (PC/Mac)

entity is the Minecraft entity value of the entity to summon. (See Minecraft Entities).

x y z is optional. ...

nbt is optional.

3 Deadly Command Blocks (Minecraft PE)

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: Ivan Babydov, Anete Lusina, Ivan Babydov, Blue Bird