Hi Frank,

This looks like a bug; to fix it, search ltk.lisp for "{callback ~a;1}" and change it to "{callback ~a;expr 1}"

-Jason

On 21:26 Mon 16 Nov , Frank wrote:

Hello,

I'm trying to use the validatecommand of entry. The following code throws an error. How do I use it correctly?

Thanks, Frank

(defun foo ()   (with-ltk ()     (let ((e (make-instance 'entry :text "hello world!"    :validate "focusin"    :validatecommand (lambda ()       (format t "validating...")))))       (pack e)))) (foo)

#| invalid command name "1" invalid command name "1"     while executing "1" (in -validatecommand validation command executed by .wc) |#