Another common cause of an object not being selected by OSMC is the collection entry not being found in the collection table (OAMADMIN.OBJ_COLLECTION_TBL) for the collection ID (ODCLID) in the object directory table for the storage group being processed.
SELECT * FROM OAMADMIN.CBR_COLLECTION_TBL C, HLQ.OSM_OBJ_DIR D
WHERE ODNAME = 'object_name'
AND D.ODCLID = C.ODCLID;
One row should be returned identifying the collection that you expect to be associated with the object.