Assigning charges manually using .car file

Hi everyone,

We want to manually change the charges of every atom in a MOF structure.

We modified the charge column in the .car file, however, after writing the charges we try to use that file in Materials Studio again but all the charges seem 0. 

We have checked the format of the .car file and it is correct in terms of structure ( spaces, columns and lines).

Whatever we tried we couldn't change the charges from their initial settings -which is 0-.

Do you have any suggestions for manually changing the charges of a MOF structure atom by atom?


P.S: Since we are working with extreme amounts of atoms, we can't change the charges via Materials Studio Visualizer by manually selecting an atom and inputting its charge.

Thanks in advance.