What's problem you are encountering?
My custom block won't set variables.
What have you tried that didn't work?
I tried setting the input to any (unevaluated) but that didn't work.
Post a project example, link, or screenshot:
It's because you have both a block-local variable and a global variable named "program". The custom block thinks you want to set the block-local variable - your input - to what it already is (your input). Try renaming your global variable to something other than "program".
It works now! Thanks.