I have an unbalanced panel (stacked time series) I've been trying to import to GRETL for a while now, and well, when I try to put the unit numbers and time periods (it is 18 units and 32 time periods), it does not allow me to put the correct numbers, and replaces it by 17 and 35. The string code table does recognize the 18 unit variables, and I have replaced missing values with "."

Thanks in advance,
EF