Mass operations, specially if the start a processing scenario, are only possible if between each view and each material master record the transaction is finished. Technically each view / material master record maintained with MATERIAL_MAINTAIN_DARK must be finished with COMMIT WORK / BAPI_TRANSACTION_COMMIT.
Explicitly it is not possible to execute mass changes using MM17 or MM46 or corresponding changes using the Engineering Workbench (CEWB) together with processing scenarios.