Hi!
I have a quite weird problem with schematica: when I load my schematic on another map than the one where I built my original structure, the blocks of the schematic change. This is weird because the chematic is normal when I load it on the map where I built the original building.
I'm using Schematica 1.8.0.168 on MC 1.12.2. In my building I have a lot of blocks from the mod Quark.
I hope I was clear and you can help me.
Thank you
Grafistole

The schematic on the map I want to load it:

The schematic on the map I built it:

What did you use to save the schematic? Was it saved with schematica, or something else?

I saved it with MCedit, I didn't know it is possible to do it directly with schematica

MCEdit doesn't save the mod block mapping data (at least IIRC) so you'll get corrupt schematics. You can save them directly in schematica; use the numpad * (by default) to do so.

Oh okay I thought that option was to save the schematic when it's already loaded or something like that.
Thank you, I'll tell you if it's working

Schematica uses uses a non standard tag in order to save the block mapping into the schematic. Sadly that is not supported by many other tools when exporting a schematic, which means that the information about modded blocks will be lost. The same will be true for vanilla only schematics in the future.