I have a script being run from an expression in a UDT property.
When transfering this over to 8.0 I found that there was no option to use {PathToParentFolder} in the UDT properties.
Image below illustrates this further.
This is a known issue that we are working to resolve. All of the Pre-defined parameters for UDTs are currently not functioning properly and there isn’t a work around at this time.
Garth
Thanks for your reply. Good to know 
This issue was fixed in the build that was uploaded on 12/13. Please let us know if you continue to see this behavior after upgrading.