Archetype expression ${package.replace ('.', '/')} not a valid reference

[Néstor Boscán]

Hi

 

I’ve been working with archetypes for a time and I had some archetypes with
this expression:

 

${package.replace ('.', '/')}

 

And it worked, but for some reason now it doesn’t work. It throws a warning
message “is not a valid reference”. 

 

Any ideas?