error when trying patch and compliance scan now of any client

Landesk 9.5 SP2 where core was just upgraded from LD 9.0SP2.

Whenever I try and scan a client with Patch and Compliance Scan Now... from the management console, I get this error:unable to load dll 'shutdownreboot.dll': attempt to access invalid address (Exception from HRESULT : 0x800701E7).

I've seen some posts that reference copying shutdownreboot.dll from one dir to another but that same version dll exists in both places for me so that's of no use.

Thanks

Pete