This is a very special case with Enum tasks used with Global Blackboards. I cant seem to reproduce any other error using other similar Check/Set tasks.
The errors stems from the fact that the Enum tasks use a non type safe BBObjectParameter which is used within NC very rarely.
A good solution to your issue would be to use CheckVariable and select the enum you want to check (since I suppose you have already added that enum in the Type Configurator Window).
Meanwhile I am fixing the CheckEnum, although to be honest I was realy considering removing it since in v2 we can use generics like CheckVariable and SetVariable amongst the others.
Gavalakis
