Plot gaps when cells are empty

Hi
I need to plot gaps (not zeros or any othe value) on charts when cells are empty.
The values of the cells are results of GETPIVOTDAT functions, where i use a condition to empty the cell instead of filling with zero.
The formula is like this one:
=IF(ISBLANK(GETPIVOTDATA("#ccts";'Pivot_90%'!$A$3;"SLA_TIPO";"TIPO2";"tipo_circuitos.Tipo";"Carro";"Ano_Mes_Pronto";$B5));"";GETPIVOTDATA("#ccts";'Pivot_90%'!$A$3;"SLA_TIPO";"TIPO2";"tipo_circuitos.Tipo";"Carro";"Ano_Mes_Pronto";$B5))

I have a mix of charts types, line and bar, and any of them can have empty values
Thanks

No one cane help ?

Hi, it seems there is no solution, I have been searching on the net and also here there is no answer.

The main problem is there any way to "force" a cell to a null value when you have there a formula ?