Error in Dtp while loading to master data

Hi friends,

while loading data from a standard data source to master data the DTP end s with following error

i tried several times,tried clearing temp tables like psatemp, etc, then i tried removing semantic group,

nothing is really working,dtp fails within seconds,basically the status of DTP is yellow and as you know i cant change the status to red in master data,but in details tab it is red with following below errors please assist.

Data structures were changed. Start transaction beforehand

Exception CX_RS_FAILED logged