Can someone help me to convert or downgrade from higher of AutoCAD version to AutoCAD version 2016 for:Source: https://www.cadforum.cz/catalog_en/?cat=23CAD Blocks: #20968Block Shaft Split Machine / Shaft Marble Splitting.dwgAuthor: gkaplanThank you.

You can use the free Autodesk DWG TrueView 2024 viewer application to convert any DWG file to older versions. See Download.

Okay thanks for your helps.Another option i used this to convert.https://cad.online-convert.com/convert-to-dwg

One more option, run dwgsee program, and save as the drawing as old version dwg/dxf.https://www.dwgsee.com/

Please note that neither the online tools nor DWGsee will create a genuine DWG file - the drawing will be reported as "non Autodesk" and its content may be unreliable. See e.g. the Budweiser DWG compatibility test. The most reliable way is the DWG TrueView conversion.