1. Ensure proper switches with name *asr* are on.
2. The application to be used is ASR_PROCESS_EXECUTE_OVP.
Refer documentation @ http://help.sap.com/erp_hcm_ias_2012_03/helpdata/en/7b/660969749b4286b608525d532a5408/content.htm?frameset=/en/43/1d639b3fce3566e10000000a11466f/frameset.htm
Hope this helps.
With regards,
Sahir.