I use the function Close of the class MongoGridFSStream. But, an exception was caught:
Command 'filemd5' failed: need an index on { files_id : 1 , n : 1 } (response: { "ok" : 0.0, "errmsg" : "need an index on { files_id : 1 , n : 1 }" })
Does anybody have any suggestion to resolve this problem? Thanks a lot in advance.