rag — FixDevsLatest fixes and solutions for rag errors on FixDevs.https://fixdevs.com/enMon, 18 May 2026 00:00:00 GMTFix: DSPy Not Working — LM Configuration, Signatures, Modules, Optimizers, and Cache Surpriseshttps://fixdevs.com/blog/dspy-not-working/https://fixdevs.com/blog/dspy-not-working/How to fix DSPy errors — no LM configured, signature field types, ChainOfThought vs Predict, optimizer (MIPROv2) setup, retrieval module wiring, async usage, and cache invalidation between runs.Mon, 18 May 2026 00:00:00 GMTpythondspyllmopenaipromptingragFixDevsFix: Milvus Not Working — Connection Errors, Schema Setup, and Index Build Failureshttps://fixdevs.com/blog/milvus-not-working/https://fixdevs.com/blog/milvus-not-working/How to fix Milvus errors — pymilvus connection refused localhost 19530, collection schema mismatch, index not built before search, partition not found, embedded vs standalone vs cluster, and flush before search.Fri, 01 May 2026 00:00:00 GMTpythonmilvusvector-databaseragembeddingsdebuggingFixDevsFix: Weaviate Not Working — Client v4 Migration, Schema Setup, and Vectorizer Errorshttps://fixdevs.com/blog/weaviate-not-working/https://fixdevs.com/blog/weaviate-not-working/How to fix Weaviate errors — client v3 to v4 migration breaking imports, schema creation property mismatch, vectorizer module not loaded, connection refused localhost 8080, batch import errors, and hybrid search alpha tuning.Thu, 30 Apr 2026 00:00:00 GMTpythonweaviatevector-databasehybrid-searchragdebuggingFixDevsFix: ChromaDB Not Working — Persistent Client, Collection Errors, and Embedding Function Issueshttps://fixdevs.com/blog/chromadb-not-working/https://fixdevs.com/blog/chromadb-not-working/How to fix ChromaDB errors — persistent client not saving data, collection already exists error, dimension mismatch in embeddings, embedding function required, HTTP client connection refused, and memory growing unbounded.Thu, 09 Apr 2026 00:00:00 GMTpythonchromadbchromavector-databaseragembeddingsdebuggingFixDevsFix: LlamaIndex Not Working — Import Errors, Vector Store Issues, and Query Engine Failureshttps://fixdevs.com/blog/llamaindex-not-working/https://fixdevs.com/blog/llamaindex-not-working/How to fix LlamaIndex errors — ImportError llama_index.core module not found, ServiceContext deprecated use Settings instead, vector store index not persisting, query engine returns irrelevant results, and LlamaIndex 0.10 migration.Thu, 09 Apr 2026 00:00:00 GMTpythonllamaindexllama-indexllmragvector-searchdebuggingFixDevsFix: pgvector Not Working — Extension Install, Index Not Used, and Dimension Errorshttps://fixdevs.com/blog/pgvector-not-working/https://fixdevs.com/blog/pgvector-not-working/How to fix pgvector errors — extension does not exist CREATE EXTENSION vector, dimension mismatch on insert, HNSW index not used slow queries, distance operator confusion, psycopg register adapter, and ivfflat vs hnsw selection.Thu, 09 Apr 2026 00:00:00 GMTpostgrespgvectorvector-databasesqlpythonragdebuggingFixDevsFix: Pinecone Not Working — Index Creation, Serverless vs Pod, and Python SDK v3 Migrationhttps://fixdevs.com/blog/pinecone-not-working/https://fixdevs.com/blog/pinecone-not-working/How to fix Pinecone errors — ApiException 401 unauthorized, index not found, dimension mismatch, serverless spec required, Python SDK v3 breaking changes, namespace confusion, and upsert rate limit 429.Thu, 09 Apr 2026 00:00:00 GMTpythonpineconevector-databaseragembeddingsdebuggingFixDevsFix: Qdrant Not Working — Connection Errors, Collection Setup, and Filter Syntax Issueshttps://fixdevs.com/blog/qdrant-not-working/https://fixdevs.com/blog/qdrant-not-working/How to fix Qdrant errors — connection refused to localhost 6333, collection not found create_collection, vector size mismatch, filter must match schema, payload index missing slow queries, and timeout on large batch uploads.Thu, 09 Apr 2026 00:00:00 GMTpythonqdrantvector-databaseragembeddingsdebuggingFixDevs