I just had the same error show up in Autocad 2012.
I was working on the file this morning no problems. This afternoon edit some text issue shows up. audit the file I can move the text rotate copy. As soon as I edit a string of text Autocad no longer lets me do anything with that string. I get an error object is already open if I try to change any properties in the properties dialog box.
We moved your reply to its own topic in this forum.
Access a broad range of knowledge to help get the most out of your products and services.