SAP Message RSRD610 - Portal &1 KM folder for cache not specified

Diagnosis No KM directory is specified for portal destination "&V1&" for the cacheof precalculated BI documents (table RSPOR_T_PORTAL; field KM_BI_PAGE_CA CHE). Therefore the portal for this portal destination cannot be used asa cache. System Response Processing is terminated. Procedure Specify the KM directory for the cache for portal destination &V1&.