Work Order Operations user exit IWO10016 - Can't create

Hi Guys,

             I am trying to implement Work Order Operations user exit IWO10016

when double click on INCLUDE ZXWOCU13 in FUNCTION EXIT_SAPLCOIH_016.

it asks for Package and Transport details, but after that.. throwing me following error.

Operation cancelled, error while checking the object list

any one come across this error.

Thanks

Sam