Why is Wall Function returning binary values?

I see that for this post I could have found this similar post had I continued my search longer. But for my previous post I found no direct answer to my question. How long should I search before posting, and are forum users supposed to accept answers from past posts that don’t directly address their question? I want to follow proper etiquette and make the forum useful for my education. That said, I will consider your admonition from now on.