I've started having this issue, not sure how long ago, but I can't run RSOP on any users anymore.
I keep getting the error "An Error occurred while generating report: Object reference not set to an instance of an object"
The domain is 2008 R2, I'm having this same error on DCs, 2008 r2 member servers and a Windows 7 machine.
I'm hitting a wall trying to figure out why I can't run reports anymore. I CAN use the Advanced view to see things that way, but it's not what I am looking for.
I can't even run reports against my own user on my own machine. I do have rights and was able to before, but not sure at what point I lost the ability to do this.
running gpresult /h gives an invalid pointer return.
If I go to the policies that apply and click the settings tab, that all seems to work.
Can anyone give me some direction on how to resolve this please?