When you use the or Insert dialog to pull a block from a network drive, AutoCAD reads the block definition from the source drawing once . If you later modify that source .dwg file (e.g., Door-Hinge.dwg ), AutoCAD does not automatically refresh the blocks already inserted into existing drawings.
If "Update file failed" or "Update host file" errors persist: How to redefine blocks in AutoCAD - Autodesk autocad block host file updated
Antivirus programs or firewalls sometimes flag or modify the hosts file to block background telemetry. When you use the or Insert dialog to