Atomate Costcenter infotype P0027 using pa30

Hi all,

I have Query with Costcenter posting automate using Exit,

I have the Two user exits X and ZXPADU02

here i can Change the Costcenter field and i can restrict the PA and Company code level.

But when i change the value or create duplicates values overlaps in pa30 infotype 27.

is thare any way to use the automation...

my requirement is that,

i have a z table have PA ,Personal Subarea and Costcenter fields,

When the user create are change the Costcenter infotype 27 ..

i need to check the validation for that employee PA and Personal Subarea based on this condition ztable Costcenter trigger.

can u give me any solution....

Thanks.