SAP Message RSM1151 - DS &1 from SS &2 does not exist or is not assigned in IS &3

Diagnosis It may be that the DataSource &V1& no longer exists in source systemV2 or that it is no longer (or not yet) assigned to infosource v3. Procedure Check that DataSource &V1& exists in the source system &V2&. Check thatthe DataSource is assigned to InfoSource &V3& (check the mapping of theDS to the IS)