The semantically partitioned object must be active and the modified (M) version must match the active (A) version.
If you are using an SAP HANA database and want to benefit from it when loading data into semantically partitioned objects that are based on InfoCubes, we recommend converting existing semantically partitioned objects. Activation of standard DataStore objects is automatically optimized for SAP HANA. In the case of semantically partitioned objects that are based on DataStore objects, you therefore do not need to do anything.