Full_Name: Hallvard B Furuseth Version: LMDB_0.9.17 OS: Linux x86_64 URL: Submission from: (NULL) (2001:700:100:202::105) Submitted by: hallvard Put(0 data items, MDB_MULTIPLE) stores 1 item. The doc does not warn against 0 items. I suggest supporting 0 items, it is a commonly supported convenience elsewhere (e.g. memcpy). Why does MDB_MULTIPLE require a cursor? mdb_put() rejects it.