can't create custom dmg with disk utility

[cohen777]

In order to archive video from my camcorder I create 16 Gb custom dmg's with disk utility. I am running Mountain Lion 10.8.2. I have been able to do this, without problems, before with Lion and Snow Leopard. However, now with Mountain Lion I can't create custom dmg's over 1GB. I can create dvd dmg's and dmg's under 1 gibabyte. The error message I get is "resource busy." Any help would be appreciated.

 

[cohen777]

After some more research I found that I had a third party conflict between drive genius (driveplus module) and disk utility. In the preferences for Drive Genius I turned off driveplus, and then disk utility was able to create a custom dmg.