Standard SAP Error is not caught while recording in Transaction PP02

Hi ,

When we are trying to create Position to Cost center through PP02 , we are getting an error "Entry is not allowed (due to K "cost center" and P
"Emp No").".

But the same when we try to do via SHDB by creating recording or using FM' s like RH_PNNNN_MAINTAIN no error is thrown.

Our requirement is to do a mass creation of OM relationships via custom program with all the standard validations and errors.

Please guide me on this.

Thanks

1. Satyam.