Runtime error 29068 when try to delete a form using VBA in Access2010

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Hi all,

I tried to delete a form using VBA in Access2010. The code is like this

DoCmd.DeleteObject acForm, strFromName

But I got runtime error 29068 "cannot complete this operation. You must stop the code and try again"

The same code works well in Access97. I don't know what happened.

Could somebody here help me out? Appreciate it a lot