open ACAD dwg

I just installed Libre and see that I cannot open my dwg drawings created in ACAD LT. How can I do this?

If I want to open a dwg file (autocad file) I get the following popups
 see my screenshots




second screenshot



When I click OK then I no dwg file in librecad.
however, the permissions are correct

he says experimental save your work first

so it is only experimental? and  nothing else happens.

see http://forum.librecad.org/Open-dwg-error-Visual-c-tp5717162p5717164.html

You can use the free ODA File converter (previously known as Teigha file converter) to convert DWG to DXF

https://www.opendesign.com/guestfiles/oda_file_converter

I have bought the dwg dxf convert price 44.52 €

This works well

Sir, how to chose the version of DXF which LibreCAD can use . As of now the LIbrecad is not able to recognise the converted DXF
Regards
Sanjay VErma