another random error message

Not sure but it might have to do with the fact that if you have two replace operators (or more) RapidMiner auto numbers them (i.e. Replace (16) and Replace (14)). Does it give you an error when you paste only 1 Replace operator?

Scott,

Does your log view show anything else about the error?  

It may also be worthwhile to create a building block with the operators you are trying to replicate.

oh interesting - never thought that those numbers meant anything.  Anyway it's not really a big deal from my end - just something that appeared one day and I know that you folks like to see them.  Yes I use building blocks all the time now and, in fact, have several suggestions of improvements (see other thread).

Thanks as always.

Scott