If you maintain blocks as individual external files rather than within a single host drawing:
While this method worked reliably for older versions, recent updates (AutoCAD 2024–2026) have introduced countermeasures that make simple host file blocking less effective. autocad block host file updated
To update AutoCAD blocks using a (a central drawing containing master block definitions), you must redefine the blocks in your current drawing to match the master versions. Method 1: Using DesignCenter (Recommended) If you maintain blocks as individual external files
If "Update file failed" or "Update host file" errors persist: How to redefine blocks in AutoCAD - Autodesk autocad block host file updated