1. from link:
These settings are part of the profile settings.
Just wanted to add to it.
If you need to stop those warnings even before the drawing is opened in AutoCAD, you can directly edit the .aws file by parsing it as an XML.
Add the following as a child node under the <HideableDialogs>
<HideableDialog id="AecUiBase.PreviousVersionOpen" result="8" />
This change is to be done in the FixedProfile.aws
%AppData%\Roaming\Autodesk\AutoCAD Map 3D 2012\R18.2\enu\Support\Profiles
<Profile> <StorageRoot> <AcApData> <HideableDialogs> <HideableDialog id="DrawingOpen.ForeignDWGFile" title="Open - Foreign DWG File" category="Drawing Open" application="" result="1001"> <Preview> <TaskDialog Source="/AcTaskDialogs;component/TaskDialogs.xaml" Id="DrawingOpen.ForeignDWGFile" xmlns="clr-namespace:Autodesk.Windows;assembly=AdWindows"> </TaskDialog> </Preview> </HideableDialog> </HideableDialogs> </AcApData> </StorageRoot> <Name>*Fixed_Profile</Name> <Description> </Description> </Profile>