I tried to change the particle, the coords and all those parameters and it simply dont work.
Note: I used it in 'Tick Event' Trigger of a block. The procedure works, because not only spawns particles but it places a block, and the block places correctly.
Maybe its me that i dont understand how does it really works. I have this procedure:
It triggers by a Tick Event of a block. The procedure block that places the obsidian works great, but no particles appear.
The tick rate of the block is 1, and, in the client, i have the option 'Particles' to 'All'.