>Michel, see the picture. I am again getting an unexpected result.
>
>UPDATE: Ah, I now get a result. Instead of filling in
>

"sys(3050)"

>I filled in
>

"sys sys(3050)"

>That helped, I thought, because there were results. However, only some of them contained "sys(3050)". Also, if I correctly understand the algorithm, it should produce only those messages that literally contain "sys sys(3050)". And I assume that none contain exactly that phrase. Makes me wonder how to retrieve the messages containing "sys(3050)"...

You got that result because that string, the first one entered, was only one word. And, those special characters make such word to be omitted in the index. But, as you found out, by adding at least one valid search word, it helped to get some results. But, those special characters are not indexed. So, the retrieval would not be found as is.