(import (chicken io) ; for read-lines
        (chicken string)) ; for split-string

(define (file->lines filename)
  (with-input-from-file filename read-lines))

(define strdata (file->lines "file.txt"))

(split-string "toto:titi" ":")

;; as a result I get this error
; loading afinn-165.scm ...
; loading /var/lib//chicken/11/chicken.io.import.so ...
; loading /var/lib//chicken/11/chicken.string.import.so ...

; Error: unbound variable: split-string