In AutoCAD LT 2015, i have a cad drawing that says it is invalid when i try and copy and paste. Some key information:
1) I can copy and paste fine in some of my other CAD files.
2) I use to be able to copy and paste fine in this particular drawing, but started having this issue a couple of months ago.
3) If I use a coworkers computer, I am able to copy and paste fine in the drawing, using AutoCAD LT 2015.
4) I can paste in text from word and excel, just not from AutoCAD.
5) If I try to copy text from CAD and paste into word, CAD will pop up in the foreground of my screen with a new drawing very briefly, closes, and then displays my original CAD drawing. In word only a blank pasted outline shows up. My drawing file history shows a new drawing had opened (i.e. Drawing.dwg) and also shows something that looks like a block was created (i.e. C:\Users\....\A$C2454455)
I have tried a few things so far, including a purge, deleting most of the drawing and all xrefs, and a disk defrag without any success. Please let me know if you know how to fix this.
