I want to merge two different zeolite to make zeolite-templated carbon, so I use New structure and import two different .cif files using structure parameters. And there is always warning signs. It's the sign about the lattice parameter. when I do not overwrite the lattice parameters, VESTA stops working. Otherwise, if I overwrite the lattice parameters, the VESTA merge two different files. And I import the files with cartesian coordinate, the file is saved. But if I open the saved file, all the carbons are missing. Please help me if any experts know this problem.