i'm trying to modify some visio files where i've inserted CAD drowings.
I receive the following error: "An error (1415) occurred during the action Open Object. Visio is unable to edit the Unknown object."
I created these files using Visio 2007 and Autocad 2010.
Now i changed the PC and i have Visio 2010 and Autocad 2013.
The CAD-add in is included in Visio, but seems that there's no relation betweene the object to open and the type of object.
How can i solve this probelm? Unfortunately i don't have the dwg files.