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skills/document-sync/references/TROUBLESHOOTING.md

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+# Troubleshooting
+
+## Common Errors
+
+### Connection Refused
+```json
+{"error": "Network error: Connection refused"}
+```
+**Fix**: Start document server in the correct folder document-server with: (`docker-compose up -d`)
+
+### File Not Found
+```json
+{"error": "File not found: /path/to/file"}
+```
+**Fix**: Check file path is correct
+
+### Document Not Found
+```json
+{"error": "Document not found: doc_xxx"}
+```
+**Fix**: Run `doc-query` to find correct document ID