📌 This error is rarely about the drawing itself; it is almost always a Windows User Account Control (UAC) or file system permission issue. To help you narrow this down, let me know: Does this happen with every file or just one?
Are you saving to a (C:) or a network/cloud drive ? Did you recently update Windows or move to a new computer? Make Sure You Can Write To Current Directory Autocad 2013
Search for "UAC" in the Start menu and select . 📌 This error is rarely about the drawing