On further testing, I found previous code faulty. Basic idea is the same but instead of redefining inside subclass
pbc_create_pbc_=: create_pbc_ pbc_destroy_pbc_=: destroy_pbc_ it should redefine "create" and "destroy" inside the parent class coclass 'pbc' pbc_create=: create=: .... ) pbc_destroy=: destroy=: codestroy Otherwise the object "pbc" rather than the object created with template "pbc" is referenced. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
