We have created travel request till 31.03.2012 say 300 . We have also filled PR05 for those trips. But we have not processed PREC , PRFI , PRRW of those trips. Now we have created new request from 01.04.2012 on wards as 301,302,so on. Now our requirement is user should not be able to run PREC,PRFI and PRRW of trips created before 31.03.2012 (i.e.. from 1 to 300) . User can only execute from 301 on wards. Please guide how to do this.