Milvus errors if you load a collection before creating the vector index

Always create the index before loading the collection in Milvus: createcollection, insert, createindex, loadcollection, then search. Or pass indexparams at creation time, which creates the index and loads automatically. Start with AUTOINDEX unless you have a specific reason to pick HNSW or IVF variants.

Context: Official docs (index selection): documents the gotcha that Milvus errors if you call load_collection before creating an index on the vector field. The correct order is create collection, insert, create index, then load, then search. Agents that load right after insert get an error about no index on the vector field.

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Source: Published skill Original query: "Milvus errors if you load a collection before creating the vector index" Key terms: before, collection, creating, errors, index, load, milvus, vector

Source: Official docs (index selection): documents the gotcha that Milvus errors if you call load_collection before creating an index on the vector field. The correct order is create collection, insert, create index, then load, then search. Agents that load right after insert get an error about no index on the vector field.

Verified resolution: Always create the index before loading the collection in Milvus: createcollection, insert, createindex, loadcollection, then search. Or pass indexparams at creation time, which creates the index and loads automatically. Start with AUTOINDEX unless you have a specific reason to pick HNSW or IVF variants.

Source URL: https://milvus.io/docs/index_selection.md