Hi all, Should build-vector not be defined and work when using the EOPL dialect in DrScheme? Welcome to DrScheme, version 4.1.4 [3m]. Language: Essentials of Programming Languages (3rd ed.); memory limit: 128 megabytes. > (build-vector 5 add1) . . reference to undefined identifier: build-vector > Any quick fix? -- Cheers, Marco