Update: With AutoCAD 2016 and later versions the feature of password protecting AutoCAD files has been disabled because it no longer meets the present security standards. You can open password protected files of older versions using AutoCAD 2016 or any latest version without requiring passwords. For more on this see this page on Autodesk knowledge network. However, you can use some alternative…

There are many reasons that can cause errors in your drawing but if you keep your AutoCAD drawing clean you can avoid many inadvertent errors. Most of the drawings containing errors can be repaired using some well-known tools like AUDIT and RECOVER. There are also many drawings which can hardly be repaired by these tools. You can use some workarounds for repairing…