Hi,
you have a checkbox on the bottom of the right side, mark it and it will never be called again.
If you want to disable it you can search the registry where the entry is saved and you can recreate that to other users by making the change in the registry manually or by your VBA-prog.
- alfred -
After research, the setting is not saved in registry. It's in the FixedProfile.aws like below.
I think it's very hard to disable all the popup dialogs in this case.
<HideableDialogs>
<HideableDialog title="Open Drawing - Previous Version MEP Objects Detected" result="8" application="AutoCAD 2012 - Simplified Chinese" category="System Warning" id="AecbPreviousVesionWarning">
</HideableDialog>
</HideableDialogs>