warning dialog box)

Thanks to all of you that did want to help me.

As you suggested to run the repair, I did one last search and found that the unitsres.dll under the AutoCAD folder was missing. I replaced it in the directory and now when I type the units command it returns the normal dialog box. I opened a drawing drew a couple of lines, selected the units command worked, save the drawing re-opened and now works fine. I believe that file was lost because AutoCad shuts it self off and I had to do a recovery file.

Thanks again. 

Be well

If I run the repair, would I loose all the settings, work spaces and customization's I have done?

I also found that when I type at the command line appload units, it takes me to a dialog box where I can search for it.

I founded I clicked on load and it returns a samall dialog box saying: unitsres.dll not found.

I did search for it on the NET founded the "unitsres.dll" and downloaded. someone told me not to use it 

because they usually come bundle with viruses. I believe the file is corrupted. Do you think you can send

me a copy of yours please, so I can re-inserted in the directory. I like to try this approach first, before

I do a repair.

Thanks again Robert

Be well

Please show me the steps

Yes the command work previously

No changes to the CUI

I undefined and redefined the command

Have not try to reset the profile

So far this is the only command not working

I did try going through the Ribbon