How to use substring with queryXMLNode?

Hi partners !!

Well, I have a question about queryXMLNode service, let me explain my situation:

I have an XML and need to filter it by tag, but this tag is a string and I need to use one substring for get a character and validate it. It’s my query:


At the moment to execute this query , WM shows me following error:

substring is not a recognized function or method name

Someone what is error?, is valid my query?

Thanks !!!:slight_smile: