Right click on the desktop icon and select Properties.
Make sure your Target is something like
"C:\Program Files\Autodesk\AutoCAD Civil 3D 2013\acad.exe" /P AutoCAD
(where the AutoCAD Civil 3D 2013 is replaced with the appropriate folder name for Mechanical)
the Start in is something like
"C:\Program Files\Autodesk\AutoCAD Civil 3D 2013\UserDataCache\"
and after starting AutoCAD check Options>Profile and make sure it is on AutCAD...
Mechanical (and as you can see Civil 3D) run on top of vanilla AutoCAD.
Along with the profile name argument, there may also be an /ld argument for loading the ARX support file at start-up. This should be ommitted for running OOTB AutoCAD.
Your request is not unreasonable, but I'm afraid I'm not in a position to assist in that way.
I see that JDMather has posted a new reply, so maybe he will be willing (I know he's able) to give you more detailed help.
By the way, there's not a lot of difference between 2012 and 2013 products, and 2013 gives you the advantage of being up-to-date with the file format. I know you will be able to get the 2013 product to behave the way you want, so you shouldn't feel any regret about choosing it.
When I bring up the properties window, the target window is grayed out and cannot be modified.
How does one get around that problem?
If you are trying to modify a shortcut you copied from Start, Programs, etc., you cannot edit it.
You must create a new shortcut on the desktop from scratch.
this feedback and posts are all well and great,
but can someone explain why AutoCAD default to the last install?
ie I have a Product design suite with A civil 3d package,
Autocad seems to open through the Autocad Icon, but with Civil 3d,
and if I open a .dwg from the vault, there is no consistency,
sometimes open with AutoCAD, sometimes with Mechanical, and then with Civil 3d,
how Can i set this to use one application only for all .dwg files, and keep it to default to that.
secondly, is there an Internal variable or macro that control this?
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