I prepared a structure of Aluminium doped Zeolite. Total 8 Silicon were replaced by Al. next, I want to introduce 4 Na atoms and two Zn.atoms, I imported zeolite from the structure > Zeolite. Charge was distributed as given instruction in to the manual. Sodium has charges = 1 and Zn = 2. However, when I start the calulation, gives the following information. How can I go correctly on the process?

With best regards'

Keshab K. Adhikary